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

No annotations are provided, so the description carries the full behavioral burden, and it does well: it discloses exactly what is returned, that include_content returns base64 bytes with metadata included, and that include_original yields the pre-conversion HEIC/TIFF. It omits error behavior for unknown ids, payload-size caveats for base64, and any permission requirements, which keeps it short of 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?

Two sentences, front-loaded with the primary return value and then the flag semantics. The long parenthetical field list is dense but informative; nothing is redundant.

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 no output schema and no annotations, the description supplies a solid picture of the return payload and the optional behaviors. Remaining gaps — not-found handling and the size implications of base64 retrieval — are modest for a single-item read tool.

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 0%, so the description must compensate, and it does for the two flags by explaining the concrete value each produces and the mutual relationship (content includes metadata, original only applies when a conversion happened). media_id is left implicit — obvious from context but never stated, and the enum string form 'true'/'false' is not mentioned.

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?

The description names a specific verb+resource (fetch one photo or video's details) and enumerates the payload (summary findings, readable text, measurements, transcript, key moments, taken time, location, camera fields, file metadata). That is far more specific than the sibling media_list or media_search, though it never explicitly states the contrast with those tools.

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?

It gives clear conditional guidance for the two optional flags (set include_content for base64 bytes, include_original for the unconverted HEIC/TIFF). However, it never says when to reach for this tool versus media_list, media_search, or media_getMarkup, so the selection guidance is only implied.

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