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

Goes well beyond the annotations by disclosing idempotency ('confirming the same terms again changes nothing'), cost ('free'), and absence of external side effects ('it sends nothing to the creator'), which reinforces openWorldHint=false. The stated prerequisite and resulting pipeline stage are exactly the context an agent needs before mutating state.

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?

Four short sentences, front-loaded with the action and state transition, then conditions and caveats. The one-word 'Free.' earns its place as a cost signal, though the paragraph is slightly dense and could be split more cleanly into when-to-use versus behavior.

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 mutation tool with no output schema, the description covers the important ground: the stage the record moves into, the no-side-effect guarantee, the idempotency behavior, and the prerequisite email. Only a fuller sense of what the caller should verify afterward is missing, which is a minor gap.

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%, so every parameter including terms, price, deliverables, and liveWindow is already documented in the schema. The description adds only a general reference to 'the agreed terms' and no format or usage nuance beyond that, so the baseline applies.

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 resource ('records that the creator agreed to work with the user') plus the resulting state change ('moves them to the collaboration stage, waiting on the user to prepare it'). This is clearly distinguishable from siblings like record_reply and send_email, since the description explicitly says it 'sends nothing to the creator.'

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 a clear gating condition ('call it only once the creator has clearly said yes to the terms') and a prerequisite ('needs an email sent first'). It stops short of naming a sibling tool for the alternative case (e.g., when the creator has not yet agreed), so it falls just short of the top mark.

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