Complete a Teamline task

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

Annotations already declare readOnlyHint=false, idempotentHint=false, and destructiveHint=false, so the agent knows this is a mutating but non-destructive operation. The description adds the auth detail (token from TEAMLINE_API_KEY) and the API method name, but does not disclose any side effects, error behavior, or consequences of completion beyond the obvious state change. It neither contradicts annotations nor adds significant behavioral context.

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 brief and front-loaded with the action ('Mark a Teamline task complete'). The subsequent sentences about the API method and token source are useful but could arguably be merged or trimmed without losing clarity. It is concise overall, with no redundant filler, though the token sentence is somewhat tangential.

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 one-parameter tool with no output schema, the description covers the essential purpose, the required parameter, and an auth note. It does not specify the return value or any side effects, but given the annotations carry the safety profile and the tool's simplicity, this is mostly complete. The absence of output schema information is acceptable since the tool likely returns a standard success/failure response that an agent can infer.

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% and the single parameter 'task' already has a clear description ('Id of the task to complete'). The description repeats this by saying 'Requires task (id string)', which adds no additional meaning. Per the rubric, with high schema coverage the baseline is 3, and the description does not enhance the parameter's semantics.

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 and resource: 'Mark a Teamline task complete'. This unambiguously distinguishes it from siblings like teamline_tasks_list or teamline_tasks_create. The action is clear and the resource is named, so an agent knows exactly what this tool does without needing to inspect the 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 implies usage by stating the tool completes a task, but it does not explicitly say when to use it versus alternatives, nor does it mention any conditions for exclusion. There is no mention of prerequisites like an existing task or case where this should not be used. It is adequate for a tool whose purpose is inherently straightforward, but explicit guidance is missing.

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