Update a writer

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

The description indicates 'Update' implying mutation, but does not disclose behavioral traits beyond what annotations provide (which are minimal). No mention of permissions, idempotency, or side effects.

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 concise with two sentences and no extraneous information. It is front-loaded with the action, but could be more structured by separating usage guidance.

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 no output schema and only 2 parameters, the description lacks completeness: no mention of response, error handling, or idempotency. It is insufficient for a mutation tool.

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 description adds minimal value beyond the input schema: it repeats the partial update guidance. Schema coverage is 50%, but the description does not compensate for the undocumented 'writer_id' parameter. The 'fields' parameter description is already in schema.

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 'Update a writer', with a specific verb and resource. It distinguishes from sibling tools like create_writer and delete_writer, but the description is minimal and lacks additional context on scope.

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 advises to supply only changed fields ('Supply only the fields you want to change') but provides no guidance on when to use this tool versus alternatives (e.g., create_writer) or any exclusions.

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