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

With annotations supplying destructiveHint=true, the description adds a genuinely useful behavioral detail — 'Only provided fields are changed' — clarifying partial-update semantics. It does not, however, explain what the destructive flag implies for this tool, whether changes are reversible, or any auth requirements, so it only modestly exceeds the annotation baseline.

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?

Three short sentences, front-loaded with the core action, with the partial-update rule immediately following. The REST mapping is compact and useful; no filler, though it could be tightened to two sentences without loss.

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 10-parameter mutation tool with no output schema, the description covers the essential partial-update behavior and endpoint, and the schema carries the parameter detail. It stops short of explaining the destructive nature of the operation or any side effects, which an agent should know before mutating a task.

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 every parameter including enums (priority, eventCategory) and chunk-size fields is already documented. The description adds only the general rule that unspecified fields are left unchanged, which is a semantic clarification rather than per-parameter detail; 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 ('Update fields on an existing task'), and the PATCH reference reinforces the partial-update meaning. It does not explicitly differentiate from siblings like reclaim_create_task or reclaim_mark_task_complete, but the update semantics are unambiguous from the name and description.

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?

Usage is implied rather than stated: an agent can infer this is for modifying an existing task by id, and that create/delete siblings are for other operations. There is no explicit 'use this when... instead of...' routing guidance and no prerequisites such as required permissions or a valid existing task id.

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