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

Annotations already declare the safety profile (not read-only, destructive=false, idempotent=true); the description adds genuinely new behavioral context by stating history is retained and the action is reversible by re-tracking. It stops short of permissions or side effects on dependent data.

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 with zero filler, and the primary action is front-loaded before the reversibility note and cross-references.

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 single-parameter, idempotent mutation with annotations and an output schema already present, the description supplies the one thing an agent most needs to know – that the action is non-destructive and reversible. Only the absence of explicit usage conditions keeps it from being fully complete.

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?

With 100% schema coverage the single parameter is already fully documented ('Competitor id from list_competitors'). The description adds no syntax, format, or sourcing detail beyond the schema, so the 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 ('Stops tracking a competitor') and names its direct counterpart track_competitor, so an agent can distinguish it from the many other competitor tools without opening a schema.

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 'Related:' line points to list_competitors and track_competitor, which implies the reverse operation exists, but it never states when to untrack versus when to leave tracking in place, nor any precondition. Usage is inferred rather than stated.

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