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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is known. The description adds that the operation is 'Free' and requires credentials from watch_field, but does not elaborate on what 'stop' destroys or any rate limits. Given annotations cover the core behavior, a 3 is appropriate.

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?

One short sentence (with a leading 'Free.') that front-loads the cost and then states the action and required inputs. No wasted words.

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 simple two-parameter tool with rich annotations and no output schema, the description covers the essential: cost, action, and credential source. It lacks detail on error conditions or return behavior, but given the annotations and simplicity, it is largely complete.

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 0%, so the description must compensate. It clarifies that both watch_id and secret are values returned by watch_field, adding origin context. However, it does not describe format, constraints, or the nature of the secret beyond its source, so more could be done.

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 'Stop' and resource 'field watch', and references watch_field as the source of credentials, which distinguishes it from watch_status and watch_field. However, it doesn't explicitly name alternatives for checking status, so not a 5.

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?

Implies usage after watch_field has been called (since it requires credentials from that tool), but does not explicitly state when to use this vs watch_status or any exclusions. Guidance is implied rather than explicit.

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