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

No annotations provided, so the description bears full burden. It only says 'Get' (implies read) and 'names only' (a behavioral detail). However, it omits error behavior (e.g., if ID is invalid), whether the response includes any metadata, or if there are rate limits. For a simple get, this is insufficient.

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?

Extremely concise single sentence with front-loaded information. Every word serves a purpose; no waste. However, it is perhaps too brief but still scores high on conciseness.

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?

Given the tool's simplicity (1 param, no output schema, no annotations), the description covers the core action and a key constraint ('names only'). However, it lacks details on response format, possible error messages, and how 'names only' manifests in output. It is minimally complete but not fully informative.

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?

Schema description coverage is 100% (id parameter with 'Birth UUID' description). The description adds 'names only' but does not elaborate on the parameter itself. Thus, no added value beyond schema, meeting baseline 3.

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?

Clear verb 'Get' and resource 'birth', with specific constraints: one public birth by id and 'names only' which distinguishes from list_births (multiple) and search_births (search). The differentiation from siblings like random_birth is implied.

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?

No explicit guidance on when to use this tool over siblings. The description is minimal; it does not mention alternative tools or conditions (e.g., 'use this when you have a specific ID, otherwise use search_births').

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