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

The annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=true and openWorldHint=true, so the safety profile is covered. The description adds genuinely useful context that the update propagates to the originating call's chat, but it never explains the destructive side (e.g. whether a new status, note or links replace existing values) or any error behavior for invalid ids.

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 short sentences, front-loaded with the action and allowed values, then the visibility effect. Little waste, though 'with a short note and links' partly restates parameters the schema already describes.

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?

With four parameters, no output schema and full annotation coverage, the definition is workable but thin: it omits any statement about what the destructive hint means in practice, whether omitted fields are preserved or cleared, and what the caller receives back.

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 75%, so the schema documents most parameters; the description reinforces that note is 'short' and links point at what was made, and restates the status enum already present in the schema. It adds no syntax or format detail beyond the schema, so the baseline of 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 ('Sets a task's status') and names the allowed values (working, done, blocked), which is enough to distinguish it from read-only siblings like get_task or my_tasks. It stops short of naming any sibling explicitly, but the mutation framing is unambiguous.

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: you call it to record status and a note on an existing task. There is no explicit when-to-use vs. when-not, no mention of needing a task id obtained from elsewhere, and no guidance relative to sibling tools such as get_task or my_tasks.

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