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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered; the description adds genuinely new content by disclosing what the response itemizes — each workspace's available permissions and which is the default. It does not mention ordering or scoping to the caller's membership, but the added return-shape insight is real value beyond the annotations.

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 fragment that front-loads the resource and packs three distinct facts (membership scope, per-workspace permissions, default marker) into one line with no wasted words. It reads as a sentence fragment rather than a complete clause describing the action, which is the only structural weakness.

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 output schema, the description carries the burden of explaining return content and does so: it names the three things the agent will get back (workspaces, per-workspace permissions, default). For a zero-parameter read tool with full annotation coverage, nothing essential to calling or interpreting it 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, which is the baseline-4 case. There is nothing to document and the description correctly implies an unfiltered full listing with no arguments to supply.

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 resolves the name/title mismatch (list_projects vs. 'workspaces') by making clear the tool returns workspaces, with the permissions available in each and which one is the default. It implicitly distinguishes itself from the singular get_workspace and from switch_project, though it never names either sibling explicitly.

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: 'the workspaces you can work in' hints at a discovery call made before acting or before switching, but no explicit when-to-use statement or alternative (e.g., switch_project, get_workspace) is given. An agent must infer that this is the discovery step preceding switch_project.

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