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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the agent knows this is a safe read operation. The description adds minimal context beyond that, only mentioning the S3-compatible tool access, but does not disclose pagination, filtering, or return 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?

The description is redundant, repeating 'Get list of S3 compatible object storage credentials for user' nearly verbatim in both sentences. It could be condensed into one concise sentence without losing meaning.

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?

Given the tool has 9 parameters, no output schema, and zero parameter descriptions, the description is far from complete. It does not mention pagination, filter behavior, response format, or how to interpret the results, making it inadequate for an agent to invoke 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%, and the description does not explain any of the 9 parameters (e.g., page, size, orderBy, regionName). The phrase 'for user' adds no parameter insight, leaving the agent without guidance on required inputs like userId or optional filters.

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 clearly states the tool gets a list of S3-compatible object storage credentials for a user, with a specific use case of accessing via S3 tools like aws cli. However, it does not differentiate from the sibling tool getObjectStorageCredentials, which likely retrieves a single credential.

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?

The description implies a use case (accessing storage via S3-compatible tools) but gives no explicit guidance on when to use this tool versus alternatives like getObjectStorageCredentials, nor any exclusions or prerequisites.

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