get_brief

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does reveal that the response is 'field-trimmed' (indicating reduced fields), 'current daily' (recency), and that no auth is required. However, it omits potential behaviors like error responses, rate limits, or what fields are trimmed. This is adequate for a simple read-only snapshot but not richly detailed.

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

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

The description is a single, well-structured sentence that front-loads the core purpose ('Field-trimmed snapshot') followed by supporting details (endpoint and auth). Every word contributes value, and there is no redundant or filler content. It is concise and easy to parse.

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

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

For a simple, no-parameter GET endpoint, the description covers the essential aspects: what it returns (digest snapshot), its scope (current daily), and auth requirements (none). Since there is no output schema, the description could be more explicit about the response structure, but the term 'GitHub digest' gives reasonable context. Overall, it is sufficiently complete for this tool's complexity.

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

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

The tool has zero parameters and the schema is an empty object, so schema coverage is effectively 100%. The description need not explain parameters since there are none. The baseline for no-parameter tools is 4, and the description adds nothing about parameters—which is appropriate.

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

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

The description clearly states the tool's function: it returns a 'field-trimmed snapshot of the current daily GitHub digest'. The inclusion of the endpoint 'GET /v1/brief' adds specificity. It distinguishes from sibling tools like 'get_latest_digest' and 'get_digests' by emphasizing 'field-trimmed' and 'current daily', making the tool's unique scope evident.

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

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

The description implies usage context by noting 'FREE, no wallet or API key required', suggesting this tool is ideal when authentication is unavailable. However, it does not explicitly state when to use this tool over siblings like 'get_latest_digest' or 'get_digests', nor does it mention any exclusions or alternatives. The guidance is implicit rather than direct.

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