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 fully covered by structured data. The description adds only "from storage," which is already implied by the annotations; it says nothing about irreversibility, confirmation, or side effects on referencing content.

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 short sentence with the action and key both front-loaded and zero redundant text. Nothing to trim and nothing buried.

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 single-parameter mutation with no output schema, the description plus annotations cover the essential contract, and annotations carry the destructive/idempotent semantics. However, a destructive tool this terse leaves open whether deletion is permanent and what happens to existing posts or analytics referencing the media.

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% for the single mediaId parameter ("The media ID to delete"), so the schema already carries the parameter meaning. Baseline 3 applies since the description adds no format, source, or lookup guidance beyond the schema.

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 ("Delete") and resource ("a media file from storage") with the lookup key ("by its ID"), so an agent knows exactly what the tool does. It is implicitly distinguishable from delete_post by the resource noun, but never names or contrasts against the sibling despite a large sibling set that includes delete_post and list_media.

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?

There is no guidance on when to prefer this tool, no prerequisites, and no mention of what happens to posts that reference the deleted media. The agent gets no signal about when deletion is appropriate versus using list_media or another maintenance tool.

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