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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral context by disclosing the visibility filter (only workspaces where the user is owner or member), which an agent cannot get from the schema or annotations. Pagination behavior and return shape remain unspecified.

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?

A single, tightly written sentence with the scope constraint front-loaded after the action. Every clause carries information; nothing is padded or repetitive.

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, non-destructive list tool with full annotation coverage and no output schema, the description plus structured fields give an agent everything needed to invoke it correctly. The only minor gap is that the shape of returned workspace objects is not characterized.

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?

Only one optional parameter (apiKey) and schema description coverage is 100%, so the schema fully documents it. The description adds nothing about the apiKey override, which is acceptable given the schema already explains it. 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?

Specific verb+resource ('List workspaces') with an added scope qualifier ('the authenticated user has access to (owner or member)'), which makes the result set concrete. It doesn't explicitly distinguish itself from get_workspace / get_workspace_usage, but the list-vs-single distinction is inferable from the verb.

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?

Usage is only implied: an agent will infer this is the enumeration entry point, and the access-scope note hints at what it returns. There is no explicit guidance on when to prefer this over get_workspace or get_workspace_usage, and no prerequisites mentioned.

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