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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so safety is fully covered. The description adds that the payload includes accessible workspace IDs, but with no output schema it could say more about what 'user profile' contains or what happens for tokens with limited scopes.

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 short sentences with no filler. The core capability is front-loaded and the follow-on sentence carries actionable cross-tool context rather than restating the 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 zero-parameter, read-only tool this is close to complete: it says what is returned at a high level and how to use it downstream. The only gap is that without an output schema, the shape of the profile object and workspace list (fields, ordering, empty case) remains unspecified.

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 somewhat exceeds that by explaining how the values returned by this tool are consumed as workspace_id elsewhere, a cross-tool semantic that no schema captures.

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 states a specific verb and resource: 'Get your user profile and the workspaces you can access.' That distinguishes it from list-style siblings like list_sources or get_workspace_settings, since it is about the calling user's identity and reachable workspace scope rather than a specific resource type.

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?

The second sentence implies a prerequisite workflow: 'Workspace tools take one of these workspace IDs as workspace_id' tells the agent to call this tool first to obtain workspace IDs. However, it never explicitly says 'call this before workspace-scoped tools' or contrasts with get_workspace_settings, so the guidance is implied rather than stated.

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