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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered. The description adds genuinely new context that the annotation cannot: the competitor's change history is retained in Fledly, so removal only breaks the comparison link rather than erasing data. That materially changes how an agent should reason about calling a 'destructive' tool.

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 sentences, both front-loaded with the action first and the data-retention caveat second. Every sentence carries information an agent does not already have from the title or schema, with no filler.

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 untrack tool with full annotation coverage, full schema coverage, and no output schema, the description supplies what is needed: what it does and what survives. The only gap is the no-op case (removing a competitor that isn't tracked), which idempotentHint implies but the description does not confirm.

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% and both parameters are documented in the schema, so the description has no obligation to explain them. It adds no format, ID-resolution, or validation guidance beyond what the schema already provides, so 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?

"Stops comparing one competitor with one of the user's tracked apps" states a specific verb (stops comparing) and a precisely scoped resource (one competitor, one tracked app), making it immediately distinguishable from track_competitor and untrack_keyword in the sibling list.

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 usage is implied by the verb (use it to stop tracking), and the counterpart track_competitor is obviously the inverse operation, but the description never states prerequisites, what happens if the competitor isn't currently tracked, or any alternative tool to use instead.

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