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Basecamp MCP Server

Basecamp MCP Server

by stefanoverna
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Remote

List Basecamp Messages

basecamp_list_messages
Read-onlyIdempotent

Retrieve messages from a specific Basecamp message board. Optionally filter by title or content using regular expressions.

Instructions

List messages in a Basecamp message board (a single project). For cross-project or time-based browsing across content types, use basecamp_list_recordings instead.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "message_board_id": "<message_board_id>"
    },
    "name": "basecamp_list_messages"
  }
}

Input Schema

NameRequiredDescriptionDefault
filterNoOptional regular expression to filter messages by title or content
message_board_idYesMessage board ID

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changedv1.2.1
    • removedInput schema / properties / bucket_id
      Removed value: -{
-  "description": "Project/bucket ID",
-  "type": "number"
-}
    • changedInput schema / required
      Previous value: -[
-  "bucket_id",
-  "message_board_id"
-]New value: +[
+  "message_board_id"
+]
  2. Changed3 schema fields changedv1.0.0
    • addedInput schema / $schema
      Added value: +"http://json-schema.org/draft-07/schema#"
    • addedInput schema / additionalProperties
      Added value: +false
    • addedInput schema / properties / filter
      Added value: +{
+  "description": "Optional regular expression to filter messages by title or content",
+  "type": "string"
+}
  3. First observed

TDQS

A4.3/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true, and openWorldHint=true, so the description does not need to repeat these. It adds no further behavioral context beyond stating 'List messages,' which aligns with the annotations. No contradictions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences long, each serving a distinct purpose: the first states the primary function, the second provides usage guidance. No extraneous words, and the main action is front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a straightforward listing tool with full schema coverage and comprehensive annotations, the description is complete. It covers purpose, scope, and alternative usage, and no output schema is needed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema adequately documents both parameters. The description does not add additional meaning or context beyond what the schema provides, meeting the baseline for high coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool lists messages within a single Basecamp message board/project. It uses specific verb-resource pairing and distinguishes from the sibling tool basecamp_list_recordings by noting the scope difference.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly tells when not to use this tool and provides an alternative: 'For cross-project or time-based browsing across content types, use basecamp_list_recordings instead.' This gives clear usage boundaries.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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