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

readOnlyHint and openWorldHint are already declared, so the trailing 'Read-only' adds nothing. However, the description contributes real behavioral context beyond the annotations: that other tools default to the Default workspace unless workspace=<uuid> is passed, and that agency accounts may have several workspaces. That default-resolution behavior is not inferable from annotations or schema.

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 dense sentences that are front-loaded with the purpose, then usage, then the workspace convention; little waste. The trailing token '[#358d40]' is stray noise that slightly degrades an otherwise tight description.

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 parameters and no output schema, the description carries the full load and does so: it states what is returned (workspaces with uuids), why the count varies, and how the result is used downstream. Nothing an agent needs to call it correctly is missing.

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?

The tool takes zero parameters, so the baseline is 4. The description's mention of workspace=<uuid> describes a convention of the consuming tools rather than this tool's inputs, but it usefully explains how the returned uuid is consumed.

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 the workspaces this account can act in') and specifies the payload ('each with its uuid'). It distinguishes itself from workspace siblings (create_workspace, update_workspace, delete_workspace) by being the read/discovery counterpart.

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 says 'Use this FIRST to resolve a workspace by name ... to the uuid those tools need,' naming the condition that selects it and the follow-on tools it feeds. It also explains when multiple workspaces exist (agency/multi-brand vs single account), giving the agent enough to decide when this call matters.

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