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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is covered. The description still adds non-obvious behavior beyond them: values are never revealed, only names and metadata, and the version handshake requirement is restated. Minor gaps remain (no mention of pagination or result size).

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?

Three short sentences, front-loaded with the action and followed by the workflow pointer and version note. Little waste, though the trailing 'MCP version 2.12' is a mechanical detail that could be left entirely to the schema.

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?

No output schema exists, and the description compensates by characterizing the result (names and metadata, no values), which is the essential missing piece. For a simple read-only list tool with full schema coverage and rich annotations, that is sufficient for correct invocation.

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 coverage is 100% and both parameters carry descriptions, including the explicit mcp_version instruction, so the schema does the heavy lifting. The description only echoes that app_id is the key input and adds no syntax or format detail 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 and resource ('list backend secret names and metadata') plus a meaningful scope qualifier ('without revealing values'), so an agent knows exactly what it returns. It does not explicitly contrast with the write-side siblings (set_app_secrets, create_secret_entry, delete_app_secrets), leaving that inference to the reader.

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?

Gives a clear invocation context ('Use this tool with app_id') and routes the agent to get_secret_entry_instructions for usage and workflow, which is real guidance rather than silence. It stops short of explicit when-not-to-use conditions against the secret-mutating siblings.

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