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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the safety profile is covered; the description adds the genuinely useful, non-annotation information that the deletion is irreversible and requires user confirmation. It does not address the tension between idempotentHint=false and the idempotencyKey parameter, which keeps it from 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?

One compact sentence-cluster that front-loads the action, then the argument source, then the safety warning. Every clause earns its place with zero filler.

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 destructive, no-output-schema mutation with full annotation and schema coverage, the description supplies the essential extras: irreversibility and required confirmation. Only the idempotency behavior around the idempotencyKey parameter (which contradicts idempotentHint=false) goes unmentioned.

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 descriptions are rich (including the idempotencyKey retry semantics), so the baseline is 3. The description only mildly adds to this by sharpening where mediaId originates (list_gbp_photos).

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+resource ('Remove a photo from the listing') and routes the agent to the sibling that supplies the identifier (list_gbp_photos). It is clearly distinct from add_gbp_photo, though it doesn't name the add counterpart explicitly. A 4 because the purpose is unambiguous without being a full sibling-differentiation statement.

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?

Gives a concrete prerequisite workflow: the argument comes from list_gbp_photos, and it must be confirmed with the user first. It provides clear operating context but stops short of naming when-not-to-use or an alternative tool, so it's a 4 rather than a 5.

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