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

The annotations already declare destructiveHint=true, idempotentHint=false, and openWorldHint=true, so the safety bar is lower. The description adds real behavioral detail beyond them: 'Matching secret names replace stored values,' which explains what is overwritten. It doesn't describe permission requirements or what happens on a name collision across different entries.

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 instruction (call this with X and Y to do Z) is front-loaded in the first sentence with no waste. The trailing 'MCP version 2.12' is terse but redundant with the mcp_version parameter description. Three short sentences, appropriately sized.

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?

There's no output schema, so the description could have explained the return shape (success per entry, failures, resulting secret names) and hasn't. Annotations cover the safety profile and the description covers the overwrite behavior, but an agent learning the result of the call has to rely on the get_secret_entry_instructions pointer.

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 100% — app_id, secret_entry_ids, and mcp_version are all documented in the schema, including the one-time, opaque nature of entry ids. The description adds only the replacement-by-name rule, which is a marginal addition over the schema. Baseline 3 applies when the schema carries this much load.

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 states a specific verb+resource: bind submitted secret entry ids to an existing app via app_id and secret_entry_ids. The scope (existing app, bound entries) distinguishes it from create_secret_entry and list_app_secrets. It stops short of explicitly naming those siblings, so it doesn't fully earn a 5.

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 says to call the tool with app_id and secret_entry_ids to bind secrets, and it points to get_secret_entry_instructions for usage and workflow. But it never states when to avoid this tool or how it relates to delete_app_secrets / list_app_secrets. Usage guidance is implied and delegated rather than spelled out.

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