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

The annotations already declare destructiveHint=true, idempotentHint=true, readOnlyHint=false and openWorldHint=true, so 'Idempotent' in the description is a restatement rather than added value. It omits genuinely useful behavior: whether removal requires authentication, and what happens if the vacancy was never bookmarked (no-op vs error).

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 the action front-loaded and no filler. The second sentence duplicates an annotation and so does not fully earn its place, but the overall size is well matched to the tool's simplicity.

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 one-parameter bookmark removal, annotations cover the safety and idempotency profile and the schema covers the identifier, so little is left for the description to carry. The only real gap is the not-currently-bookmarked case and any authentication requirement.

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?

There is a single parameter with 100% schema description coverage, where slug is documented as the vacancy's public_slug. The description adds nothing about the identifier, which is acceptable when the schema already carries it, so the baseline of 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: 'Remove a vacancy from the user's bookmarks.' An agent can immediately tell this is the inverse of save_job. It does not explicitly name the sibling save_job, which keeps it 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?

The usage is implied by the inverse phrasing of the sibling save_job, but the description never says when to prefer this over alternatives or what precondition must hold (e.g., the job must currently be bookmarked). No exclusions or routing guidance are provided.

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