fitbit_request_id

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and closed-world, so the safety profile is covered. The description adds the idempotency/retry contract, which is real behavioral value, but says nothing about the ID's format, lifetime, or how it is consumed downstream.

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 short sentences, front-loaded with the action and immediately followed by the retry rule. Nothing is wasted and there is no filler.

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 no-param, no-output-schema generator, the description covers what the UUID is for and how to reuse it across retries, which is the essential contract. It stops short of stating where the ID is passed next (e.g., into a commit call), leaving minor workflow inference to the agent.

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 takes zero parameters, so per the rubric the baseline is 4. No parameter semantics are needed and the schema is trivially complete.

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?

States a specific verb and output ('Generate a UUID') scoped to 'one new meal/water draft', which links it to the draft workflow implied by siblings like fitbit_preview_meal and fitbit_commit. It does not explicitly name a sibling it is distinct from, so it falls short of a 5.

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?

Gives concrete caller guidance: reuse the same ID on retries, allocate a new ID for a new occurrence. That resolves the main ambiguity for an ID generator. No explicit when-not-to-use or alternative mentioned, so not a 5.

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