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

Annotations already cover the safety profile (readOnly, non-destructive, closed-world). The description adds real value beyond them: visibility scope ('the user can see'), the null-accuracy-until-published semantic, and the fact that a shim runs with no model call. It does not mention pagination or result limits.

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 sentences, front-loaded with the returned-field enumeration, then the definition of a shim, then the entry-point cue. The field list is dense but earns its place by compensating for the absent output schema; only minor trimming possible.

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 no output schema, enumerating returned fields is the right move and is done well; annotations cover safety. The only gap is that nothing indicates result size, pagination, or ordering for a list tool.

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%, and the schema fully explains the workspace slug including the personal-token default/override rules. The description says nothing about the workspace parameter, so it adds no meaning beyond the schema — the baseline 3 applies.

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 ('Every shim the user can see') and enumerates the exact fields returned, including a mini-definition of what a shim is. 'Start here to get a shimId' distinguishes it from workbench_shim_get, which needs an id.

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?

Explicitly positions itself as the entry point ('Start here to get a shimId'), which tells the agent when to use this over workbench_shim_get. No explicit when-not or exclusion conditions are given, but the entry-point framing covers the main routing decision.

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