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

Annotations declare destructiveHint=true and readOnlyHint=false, and the description usefully expands on that: it removes the update's source (destructive side effect detail) and notes completed receipts remain available (what survives). It does not explain the controlToken's role in authorizing this destructive action.

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 tight sentences with zero waste; the core action is front-loaded and the limitation plus the persistence note follow immediately.

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 destructive, open-world mutation with no output schema, the description covers the important behavioral facts but leaves the required controlToken unexplained and does not say what the caller receives on success beyond the receipts note. Adequate but with a real gap.

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?

Both parameters (operationID, controlToken) are undocumented at 0% schema coverage, and the description compensates for neither. The controlToken in particular is a non-obvious required credential (20-200 chars) whose source and purpose are never explained.

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 (cancels) and a scoped resource (a queued component update), plus the side effect of removing its source. This is enough to distinguish it from delete_component or discard_draft, though the description never explicitly contrasts those siblings.

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?

Provides a clear when-not condition: only queued updates can be canceled, 'applying updates cannot be canceled.' It states the boundary of applicability but does not name an alternative tool for the non-cancelable case.

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