Upload multiple media files

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

Annotations already declare openWorldHint=true, idempotentHint=false and destructiveHint=false, covering the safety profile. The description adds genuinely useful behavior beyond that: sequential (not parallel) execution, per-item results with partial failures, and a hard 20-item limit. It still omits the confirmation requirement and retry/auth behavior.

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 short sentences, zero filler, with the core action and the return/limit behavior front-loaded. Nothing is repeated from structured fields and no sentence is wasted.

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 5-parameter batch mutation with no output schema, the description covers the return shape ('per-item results and failures') and the item cap, which is valuable. But it leaves the required 'confirm: "upload"' gate, the role of folder/resourceType, and array exclusivity unaddressed, so an agent cannot call it confidently without opening the schema.

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 only 20% (only 'confirm' is documented), so the description has to compensate and only partly does: 'local files or URLs' maps conceptually onto paths and urls, but folder, resourceType, and whether the two arrays are mutually exclusive or combined are never addressed.

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+scope: uploading several local files or URLs as a batch with a 20-item cap. The word 'several' implicitly separates it from the single-file sibling cloudinary_upload, but it never names an alternative, so differentiation is only implied rather than stated.

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 when-to-use or when-not-to-use guidance. It never tells the agent to prefer cloudinary_upload for a single file, nor does it explain when batch upload (with its 20-item ceiling) is the wrong choice, even though a directly competing sibling exists.

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