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

Annotations already flag destructiveHint=true and readOnlyHint=false, but the description adds non-obvious detail: the removal is immediate and the competitor's library history leaves the account at once. That consequence (loss of accumulated history) is real context beyond the annotations. It still doesn't say whether the operation requires confirmation or can be undone, so not a 5.

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?

Three short sentences, destructive effect front-loaded before the scoping note. The final sentence largely repeats what the space_id schema description already says, so it isn't perfectly waste-free.

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 destructive mutation with no output schema, the description covers impact, immediacy and Space scoping adequately. The main missing piece is reversibility/confirmation behavior, which matters for an irreversible destructive call.

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%, so both parameters are already documented, including the space_id override semantics the description restates. competitor_id gets no added meaning in the description (no hint about how to obtain it or its scoping). Baseline 3 applies when the schema carries the weight.

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?

Names a specific verb and resource ('Stop tracking a competitor') and states the concrete effect: 'remove it from the business' and its library history leaving the account. This is clearly the inverse of track_competitor in the sibling list, so an agent can disambiguate 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 description explains the Space scoping condition (active Space by default, space_id to override) which is genuinely actionable. However, it never says when to prefer this over an alternative, e.g. that track_competitor re-adds it, or that get_competitor/list_competitors are read-only paths for inspection.

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