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

With annotations already declaring non-read-only, non-destructive, non-idempotent behavior, the description adds meaningful context beyond them: who performs the action (the signed-in person), the refusal conditions, that the reason is recorded on the deal's timeline, and the side effect that another job opens. This is strong disclosure for a mutation tool.

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 purpose is front-loaded in the first clause and every subsequent sentence carries actionable information (recording, refusals, branching effect). The phrasing is dense and slightly convoluted with the guillemet-quoted job names, but nothing is padding.

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 and full parameter coverage, the description covers actor, preconditions, refusal cases, side effects and the flag-dependent branch. It stops just short of stating whether the call can be retried or reversed, which is minor given the annotations.

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 coverage is 100%, so the baseline is 3, but the description adds real meaning beyond the schema: it explains that reason is recorded on the deal's timeline and that the_work_is_finished alters both the refusal rule and the resulting job that opens. That goes past restating the parameter descriptions.

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 names a specific verb (End) and a named resource (Tommo Closer's job «Get the deal paid» on a deal), so the agent knows exactly what is being terminated. It also clarifies the branch where the job «After the project» is opened instead, which distinguishes this action from its outcome-sibling, though it never explicitly names close_the_job_after_the_project as the alternative tool.

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?

Preconditions are stated ('Refused for a deal on which that job is not open') and the semantics of the_work_is_finished are given ('refused while an invoice of the deal is not paid'). However, there is no explicit guidance telling the agent when to choose this tool over close_the_job_after_the_project, leaving the caller to infer the relationship.

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