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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is covered. The description adds real context beyond that: it enumerates the returned facets (name, type, description, contact stats) and discloses the failure mode ('an error if none is selected'), which is not derivable from 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?

Front-loaded purpose followed by a usage condition and a Returns block; short and skimmable. The phrase 'workspace you are currently working in' is slightly restated as 'active session workspace', and the Returns block partially overlaps the output schema, but no sentence is pure filler.

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 zero-parameter read tool with full annotation coverage and an existing output schema, the description supplies everything needed: purpose, trigger condition, and the empty-selection error case. Nothing required 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 description carries no parameter-documentation burden; the baseline for a 0-param tool is 4. Nothing here misleads about inputs.

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 opens with a specific verb and resource ('Get information about the workspace you are currently working in'), and the scope word 'current'/'active session workspace' cleanly separates it from search_workspaces and switch_workspace. An agent can identify the tool without opening the schema.

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?

It gives an explicit trigger: 'Call this when the user asks which workspace they are in, or wants details about their active workspace.' That is clear when-to-use guidance, though it never names the neighboring alternatives (e.g. search_workspaces, switch_workspace) or states when not to use it.

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