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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world behavior. The description adds useful behavioral context beyond annotations by indicating the permission context for Workspace Managers and the importance of membership versions, though it does not describe return shape or pagination.

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?

Two compact sentences front-load the core purpose and then add role/version guidance. There is no filler or redundant restatement of the tool name.

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?

For a simple two-parameter read tool with rich schema descriptions and strong annotations, the description is mostly complete. It names the returned entities and version guidance, but with no output schema it could say a bit more about the returned membership/candidate structure.

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 the schema itself explains that accountId and workspaceId must be exact Company-tool IDs rather than personal platformIds. The description adds only the scope phrase 'one Agency Workspace' and does not supplement parameter meaning 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?

The description gives a specific verb and resource: reading members and eligible existing-member candidates for one Agency Workspace. It is clear enough to distinguish this as a workspace-membership read, but it does not explicitly name sibling alternatives such as company_list_team or company_get_workspace_context.

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 states a concrete usage context: Workspace Managers use this view for permitted grant changes, and it points to returned membership versions for those changes. It does not provide explicit exclusions or compare against sibling tools, so it falls short of full when/when-not guidance.

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