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

Annotations declare readOnlyHint=false, destructiveHint=false, openWorldHint=false. The description does not say what confirmation actually does (finalize/commit the upload?), whether it's idempotent, what happens on hash mismatch, or whether it can be retried. For a mutating confirmation step, this is thin.

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 efficient sentence, front-loaded with verb and resource, no wasted words. It is concise, though it is arguably too concise given the missing content.

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, return values needn't be explained. But a mutating confirmation tool with zero parameter documentation, no workflow context, and only sparse annotations leaves significant gaps an agent needs filled before invoking correctly.

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%, yet the description only names selection_key and file_hash without explaining their format, origin, or meaning. folder_name and connection_context (with its mctx_v1_ pattern) are entirely undocumented, so the description fails to compensate for the coverage gap.

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 ('Confirm') and resource ('creative upload'), which distinguishes it from sibling 'creatives_request_upload'. However it doesn't clarify how it differs from 'creatives_abandon_upload' or the relationship to the prepare step, leaving the workflow purpose only partially clear.

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?

No when-to-use guidance. It doesn't say this follows creatives_request_upload, that it must be called only after preparation, or how it relates to creatives_abandon_upload. The agent must infer the workflow from the name alone.

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