Forecall
Failure recordsDocs
All scored servers

Cherami: tool descriptions scored io.github.cherami-mail/cherami-mcp

tools/list taken
(UTC)
From
Official MCP Registry
Connected to
https://cherami.to/mcp
Homepage
cherami.to/docs/mcp
Scoring rules
v2
Removal
support@forecall.dev
Score this URL as it is today

Scores, issues and names only

This page shows how Cherami (io.github.cherami-mail/cherami-mcp)'s tool descriptions scored, the issues found and the names of its tools and parameters. The descriptions are the server's own: read them where the copy came from.

Forecall asked the URL this server lists in the official MCP Registry for its tools/list once, on the date above, without calling any tool. The server may have changed since.

servers/io.github.cherami-mail/cherami-mcp
Average score
50.6 / 100Cloudy
Tools
42
Near-identical descriptions
6

Across the server

  • Major
    42 tools. Above 40, models choose less accurately.too_many_tools
  • Minor
    The server has no instructions. Say there, once, what the server is for and when to use it: Claude Code and Gemini CLI read the instructions before the tool descriptions.instructions_missing

Tools whose descriptions are nearly the same

6 of 6 pairs shown, highest description similarity first.
ToolToolDescription similarityName similarity
bulk_update_message_labelsbulk_update_sent_message_labels0.830.80
delete_messagedelete_sent_message0.740.67
update_message_labelsupdate_sent_message_labels0.670.75
reply_messagereply_all_message0.640.67
restore_messagerestore_sent_message0.620.67
get_inboxupdate_inbox0.600.33

Tools

update_message_labels

31 / 100Rain

Purpose
6 / 20
When to use
0 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    The description only restates the name (8 words).restates_name
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: message_id, add_labels, remove_labels.param_no_description
  • Minor
    Its description is nearly the same as update_sent_message_labels's (similarity 0.67); only the names and schemas tell them apart. Say in this description when to use update_sent_message_labels instead.confusable_pair
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

update_sent_message_labels

31 / 100Rain

Purpose
6 / 20
When to use
0 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    The description only restates the name (8 words).restates_name
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: message_id, add_labels, remove_labels.param_no_description
  • Minor
    Its description is nearly the same as update_message_labels's (similarity 0.67); only the names and schemas tell them apart. Say in this description when to use update_message_labels instead.confusable_pair
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_inbox

38 / 100Rain

Purpose
13 / 20
When to use
0 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: inbox_id.param_no_description
  • Minor
    Its description is nearly the same as update_inbox's (similarity 0.60); only the names and schemas tell them apart. Say in this description when to use update_inbox instead.confusable_pair
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

list_drafts

39 / 100Rain

Purpose
6 / 20
When to use
0 / 20
Arguments
18 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    The description only restates the name (9 words).restates_name
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: inbox_id, limit.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

bulk_update_message_labels

42 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: message_ids, add_labels, remove_labels.param_no_description
  • Minor
    Its description is nearly the same as bulk_update_sent_message_labels's (similarity 0.83); only the names and schemas tell them apart. Say in this description when to use bulk_update_sent_message_labels instead.confusable_pair
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: message_ids. Name the tool or the place that returns it, or models look it up first.id_source_missing

bulk_update_sent_message_labels

42 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: message_ids, add_labels, remove_labels.param_no_description
  • Minor
    Its description is nearly the same as bulk_update_message_labels's (similarity 0.83); only the names and schemas tell them apart. Say in this description when to use bulk_update_message_labels instead.confusable_pair
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: message_ids. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_draft

42 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: draft_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: draft_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

delete_draft

44 / 100Cloudy

Purpose
14 / 20
When to use
5 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Arguments without a description: draft_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: draft_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

list_labels

44 / 100Cloudy

Purpose
13 / 20
When to use
0 / 20
Arguments
16 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: inbox_id, limit.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_receiving_policy

45 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: inbox_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_message

46 / 100Cloudy

Purpose
13 / 20
When to use
0 / 20
Arguments
18 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: message_id.param_no_description

get_sent_message

46 / 100Cloudy

Purpose
13 / 20
When to use
0 / 20
Arguments
18 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: message_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

delete_inbox

47 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Arguments without a description: inbox_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

list_trash

47 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
15 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Major
    Arguments without a description: inbox_id, limit.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

update_draft

47 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
15 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: draft_id, to, cc, bcc, subject, attachments[].filename.param_no_description
  • Minor
    String arguments with no constraint or example: subject, attachments[].filename, attachments[].type.loose_string_param
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: draft_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

update_thread_labels

47 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Arguments without a description: thread_id, add_labels, remove_labels.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: thread_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

create_draft

48 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
16 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: inbox_id, to, cc, bcc, subject, attachments[].filename, source.action, source.message_id.param_no_description
  • Minor
    String arguments with no constraint or example: subject, attachments[].filename, attachments[].type.loose_string_param
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

read_raw_message

48 / 100Cloudy

Purpose
13 / 20
When to use
0 / 20
Arguments
20 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: message_id.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

update_inbox

49 / 100Cloudy

Purpose
14 / 20
When to use
0 / 20
Arguments
20 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Its description is nearly the same as get_inbox's (similarity 0.60); only the names and schemas tell them apart. Say in this description when to use get_inbox instead.confusable_pair
  • Minor
    Arguments without a description: inbox_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

delete_message

50 / 100Cloudy

Purpose
20 / 20
When to use
5 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Arguments without a description: message_id.param_no_description
  • Minor
    Its description is nearly the same as delete_sent_message's (similarity 0.74); only the names and schemas tell them apart. Say in this description when to use delete_sent_message instead.confusable_pair
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

delete_sent_message

50 / 100Cloudy

Purpose
20 / 20
When to use
5 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Arguments without a description: message_id.param_no_description
  • Minor
    Its description is nearly the same as delete_message's (similarity 0.74); only the names and schemas tell them apart. Say in this description when to use delete_message instead.confusable_pair
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

delete_thread

50 / 100Cloudy

Purpose
20 / 20
When to use
5 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Arguments without a description: thread_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: thread_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

get_sending_policy

50 / 100Cloudy

Purpose
20 / 20
When to use
5 / 20
Arguments
10 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Arguments without a description: inbox_id.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

count_messages

51 / 100Cloudy

Purpose
13 / 20
When to use
0 / 20
Arguments
23 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: inbox_id.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

read_attachment

53 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
21 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: message_id.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id, attachment_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

list_threads

54 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: inbox_id, limit.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

reply_message

54 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
19 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Its description is nearly the same as reply_all_message's (similarity 0.64); only the names and schemas tell them apart. Say in this description when to use reply_all_message instead.confusable_pair
  • Minor
    Arguments without a description: labels, attachments[].filename.param_no_description
  • Minor
    String arguments with no constraint or example: attachments[].filename, attachments[].type.loose_string_param
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description

send_message

55 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
20 / 25
Return value
8 / 15
Constraints and side effects
10 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: subject, attachments, attachments[].filename.param_no_description
  • Minor
    String arguments with no constraint or example: attachments[].filename, attachments[].type.loose_string_param
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

forward_message

56 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
18 / 25
Return value
8 / 15
Constraints and side effects
10 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: labels, to, cc, bcc.param_no_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id, message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

create_inbox

57 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
22 / 25
Return value
8 / 15
Constraints and side effects
10 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description

get_thread

57 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
18 / 25
Return value
15 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Arguments without a description: thread_id, limit.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: thread_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

list_inboxes

57 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
25 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context

restore_message

57 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
25 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Its description is nearly the same as restore_sent_message's (similarity 0.62); only the names and schemas tell them apart. Say in this description when to use restore_sent_message instead.confusable_pair
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

restore_sent_message

57 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
25 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context
  • Minor
    Its description is nearly the same as restore_message's (similarity 0.62); only the names and schemas tell them apart. Say in this description when to use restore_message instead.confusable_pair
  • Minor
    Required identifiers whose description does not say where the value comes from: message_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

submit_feedback

57 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
25 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context

list_messages

59 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
22 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Minor
    Arguments without a description: inbox_id, limit.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description

list_sent

59 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
22 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Minor
    Arguments without a description: inbox_id, limit.param_no_description
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description
  • Minor
    Required identifiers whose description does not say where the value comes from: inbox_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

reply_all_message

59 / 100Cloudy

Purpose
20 / 20
When to use
5 / 20
Arguments
19 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Minor
    Its description is nearly the same as reply_message's (similarity 0.64); only the names and schemas tell them apart. Say in this description when to use reply_message instead.confusable_pair
  • Minor
    Arguments without a description: labels, attachments[].filename.param_no_description
  • Minor
    String arguments with no constraint or example: attachments[].filename, attachments[].type.loose_string_param
  • Minor
    The description mentions none of its 3 or more arguments.params_not_in_description

get_account

60 / 100Cloudy

Purpose
17 / 20
When to use
0 / 20
Arguments
25 / 25
Return value
8 / 15
Constraints and side effects
10 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context

get_outbound_quota

60 / 100Cloudy

Purpose
20 / 20
When to use
0 / 20
Arguments
25 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10
  • Major
    Says nothing about when to use it, or when not to.no_usage_context

get_service_info

62 / 100Cloudy

Purpose
17 / 20
When to use
5 / 20
Arguments
25 / 25
Return value
8 / 15
Constraints and side effects
7 / 10
Examples
0 / 10

No issues.

send_draft

80 / 100Clear

Purpose
20 / 20
When to use
10 / 20
Arguments
25 / 25
Return value
15 / 15
Constraints and side effects
10 / 10
Examples
0 / 10
  • Minor
    Required identifiers whose description does not say where the value comes from: draft_id. Name the tool or the place that returns it, or models look it up first.id_source_missing

What static scoring cannot tell

This score reads only the text of each description and schema: it says what is written, not what a model will do. Short tools whose names already say what they do, such as browser_close, score low here even when models use them well, and in our measurements current models chose the right tool in one step even from one-line descriptions, as long as the names and schemas differed. What the text cannot show, such as what happens over several steps and whether an added sentence helps or misleads, is what an evaluation measures, on the Pro and Team plans.

Is your server listed here and you would rather it were not? Email support@forecall.dev, and we will take it off within 7 days.

All scored servers