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

Beyond the annotations (idempotentHint=true, destructiveHint=false), the description explicitly labels this as a 'WRITE' and discloses the error contract: the label resource survives and a missing association returns 404. It does not describe the response payload, but the added behavioral detail is real and specific.

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?

Two compact parentheticals plus an endpoint, with the mutation type front-loaded as 'WRITE:' so an agent can triage risk at a glance. No sentence is redundant.

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 two-parameter write with no output schema, the description covers the operation, the endpoint, and the failure mode, which is enough to invoke correctly. Only the success response shape is absent, which is a minor gap for a delete-style call.

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 both ticket_id and label are already documented in the schema, including where ticket_id comes from. The description echoes the path shape 'DELETE /tickets/{id}/labels/{label}' but adds no new meaning about either parameter. Baseline 3 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 ('removes a label from a ticket') and immediately disambiguates from the mutating-the-label interpretation with '(the label itself stays)'. This lets an agent distinguish it from supportbee_add_label and supportbee_list_labels without opening any schema.

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?

The description gives one useful precondition ('404 if the ticket does not have it'), which tells the agent what happens on a no-op call, but it never names the sibling alternative (supportbee_add_label) or states when to prefer this tool. Usage is implied rather than directed.

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