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

Annotations already declare this is a non-destructive, idempotent write in a closed world; the description adds that a key is required and that data tools work without this setup. It does not explain what is persisted, whether it can be updated or overwritten, or what the caller gets back, so it only partially covers behavior beyond annotations.

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 short and has no filler, but it is telegraphic and not front-loaded with the tool's purpose: 'Needs a key' comes before any explanation of what the tool does. The fragments are concise but make the definition harder 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 five-parameter setup/context-writing tool with no output schema, the description leaves major gaps: it does not clarify the write semantics, how this relates to signup/setup siblings, or what most parameters mean. The optional/key notes help, but not enough for an agent to call it confidently.

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 0%, so the description must carry parameter meaning. It only loosely maps 'what your user told you they want and are building' to data_wanted/use_case and says 'Only send real answers'; it says nothing about agent, notes, found_us, required fields, enum values, or length limits.

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 title and phrasing 'files what your user told you they want and are building' suggest recording project context, but the description never states a clear verb/resource like 'saves setup details' and does not distinguish it from start_signup, finish_signup, or get_setup_fields. An agent can infer a vague optional setup write, not a precise purpose.

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?

It says 'Optional' and 'Data tools work without this,' which gives a when-not signal, and 'Needs a key' states a prerequisite. However, it does not say when this tool should be called instead of start_signup, finish_signup, or get_setup_fields, so alternatives are not routed.

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