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

Annotations already declare destructiveHint=false and idempotentHint=true, so the description's 'removing a job that was not saved changes nothing' is largely a restatement of idempotency in concrete terms. It adds useful scope ('the caller's saved jobs', i.e. per-user) but says nothing about permissions, return value, or failure modes beyond the silent no-op.

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 and its scope front-loaded and the no-op caveat second. No filler, no repetition.

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 mutation whose safety profile is fully covered by annotations and whose sole parameter is fully documented in the schema, the description is essentially sufficient. Only the absence of any statement about the outcome/return of a successful removal keeps it short of 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?

Schema coverage is 100% and the slug property already documents its pattern and provenance ('A job slug from list_matches or list_bookmarks'). The description's 'by slug' adds no meaning beyond that, 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?

States a specific verb and resource ('Remove a job from the caller's saved jobs') and scopes it to the caller's own collection. It is clearly the inverse of the sibling save_job, though it never names that sibling explicitly to confirm the pairing.

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?

Usage is implied by the inverse of save_job rather than stated: the agent can infer 'use this to un-save' but there is no explicit when-to-use, when-not, or named alternative. For an un-save tool that's mostly adequate, but it leaves the routing to inference.

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