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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds real behavioral insight beyond them: the reason is consumed by a discovery pass, and omitting it causes the competitor to be re-added on the next monthly run. It does not cover permissions or irreversibility.

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?

Front-loaded with the core action in one short sentence, then the reason guidance. The trailing clause ('which is the difference between removing it once and removing it every month') is rhetorically padded but does reinforce the consequence, so it earns its place only marginally.

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 2-parameter, no-output-schema tool with safety annotations already present, the description covers purpose, the required parameter, and the side effect of the optional parameter. It omits edge cases like unmatched names, but nothing an agent needs in order to call it correctly is missing.

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%, so baseline would be 3, but the description adds semantics the schema lacks: the reason field feeds the discovery pass and materially changes the outcome ('removing it once vs every month'). That justifies a point above baseline.

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+resource ('Stop tracking a competitor'), which is unambiguous against the sibling add_competitor. It does not explicitly name a sibling or contrast with similar untrack-style tools, so it stops short of a 5.

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?

Gives a conditional instruction for the reason parameter ('always pass the reason when the user gives one') but says nothing about when to choose this tool over alternatives such as untrack_question, or what predecessors are required. Usage is implied rather than specified.

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