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

No annotations provided, so description bears full burden. Mentions generating a User Compass as side effect, but does not disclose idempotency, error states (e.g., calling twice), or security implications. Adequate but not comprehensive.

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?

Two sentences with zero wasted words. Purpose, outcome, and prerequisite are front-loaded. Efficient and clear.

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?

Tool has no output schema, so description should indicate return values or success/failure. Currently omits any mention of what the response contains (e.g., user data, token). Also lacks handling of re-execution. Adequate for basic usage but incomplete for robust agent reasoning.

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 coverage is 100%, so parameters are documented. Description adds value by summarizing key outputs ('sets name, profession') and noting that 'dob improves compass'. This enriches schema information for agent decision-making.

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?

Description clearly states the tool completes the user's profile as a one-time signup, specifying actions (sets name, profession, generates User Compass) and prerequisite. Distinguishes from sibling 'update_profile' by emphasizing one-time signup nature.

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?

States 'Required before creating clients', providing clear context. Does not explicitly exclude use cases or mention alternatives, but context implies this is a single-use setup tool.

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