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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnlyHint=false, so the safety profile is covered. The description adds a genuinely useful, non-annotation detail: the required 'favorites.write' scope. It does not clarify whether removing a non-saved listing errors or no-ops, though idempotentHint implies the latter.

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 tight sentences: the action and scope lead, the auth requirement follows. No filler, no redundancy.

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?

An output schema exists, so return values need not be described, and annotations cover the destructive/idempotent profile. Combined with the scope-required note, the definition is nearly complete; the only minor gap is behavior when the listing is not currently saved.

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 schema already documents listingId as the numeric id to remove. The description's 'by its numeric id' restates that without adding format, constraint, or sourcing guidance, 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 ('Remove') plus resource with explicit scope ('from the current user's saved (favorited) listings'), and clarifies the identifier is a numeric id. It doesn't name or route against a sibling (e.g., save_listing), but the resource is unambiguous enough to separate it from the alert/listing siblings.

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?

No explicit when-to-use or when-not-to-use guidance. Usage is implied by the name and scope, and the scope wording does prevent confusion with deleting a listing outright, but there is no reference to alternatives such as list_saved_listings to find ids first.

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