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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds genuinely new consequence detail beyond that: deletion is permanent, the URL breaks immediately, and referencing posts render broken images until edited. It does not mention the idempotency-key retry semantics, though the schema does.

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, no filler. The core action and its permanence are front-loaded, with secondary consequences following, and every sentence carries information.

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?

With an output schema present and full annotations plus full parameter documentation, the description only needs to cover intent and consequences, which it does. Nothing an agent needs in order to invoke it correctly is missing, though a note on restoring a still-referenced image or permission requirements would round it out.

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% and every parameter (blog_id, media_id, idempotency_key) is documented in the schema with format and constraint details. The description only echoes 'by id', adding no semantics beyond the schema, so the 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?

Names a specific verb (delete) and resource (uploaded image) plus the lookup key ('by id'), so an agent can immediately tell it apart from upload_media, list_media, and delete_post. It stops short of explicitly naming a sibling or stating scope boundaries, which is what would push it to 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?

Usage is only implied: an agent infers this is the tool for removing a single existing image, presumably after list_media identified it. There is no explicit when-to-use/when-not guidance and no mention of any alternative for removing a post's reference instead of the file itself.

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