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

Beyond the annotations, the description discloses that the action is taken as the signed-in person, that the deal's timeline records who closed the job and why, and that the call is refused when the job is not open. These are meaningful behavioral and audit details not available from the annotations alone.

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 front-loaded and each sentence contributes needed information. The first sentence is somewhat long and clause-heavy, which slightly reduces readability.

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 behavioral context: authentication identity, required rationale, audit trail, and refusal condition. The annotations already cover read/write, idempotency, openness, and destructiveness, so nothing critical is missing.

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 the baseline is 3, but the description adds useful meaning by specifying what the required 'reason' should convey: that Tommo proposes no more letters, review requests, or dates to contact the customer again. It does not add any syntax or format detail for deal_id beyond the 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 states a specific verb ('End') and a precise named job ('After the project') on a deal, which lets an agent distinguish it from sibling tools such as close_the_job_that_gets_a_deal_paid. The scope is narrow and unambiguous.

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 gives a clear precondition — the tool is refused when that job is not open — and describes the required rationale. However, it does not explicitly name an alternative tool or state when a different close-job tool should be preferred.

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