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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds useful context beyond that: results are limited to the authenticated user's accessible workspaces, and the workspace id is the value to propagate downstream. It does not discuss empty-result behavior, which is the only notable omission.

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 sentences, both front-loaded with the highest-value information: first what is listed, then the mandatory call ordering. Nothing is redundant with the title or annotations.

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 an output schema present, the description needn't describe return values, and with zero parameters there is no input burden. The main remaining gap is what an agent should do if the list is empty (e.g., no workspaces available), but for a simple discovery tool this is close to complete.

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; there is no parameter semantics for the description to explain. The description correctly frames the tool as a lookup whose output feeds other calls rather than inventing input requirements.

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 personal and organisation workspaces') and scopes it to the authenticated user, which tells an agent exactly what comes back. No sibling tool lists workspaces, so there is nothing to disambiguate against, but the resource boundary (personal vs organisation) is made explicit.

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?

Gives an explicit prerequisite and sequencing rule: 'Call this before any workspace-scoped tool and pass the selected workspace id to every subsequent call.' This is exactly the when-to-use guidance an agent needs for a dependency-style discovery tool.

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