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

Annotations already flag destructive=true and idempotent=true, but the description adds genuinely new behavior: no revision or receipt is returned, retries are last-write-wins, and concurrent name edits can be clobbered. That is exactly the kind of failure-mode information structured fields cannot express. The idempotent/overwrite nuance is a refinement, not a contradiction, of the hints.

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 tight sentences, no filler, with the primary action front-loaded and the caveats after. The second sentence is compressed to the point of being slightly awkward ('No revision/receipt exists'), costing a little readability but nothing is wasted.

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 and rich annotations, the description only needed to cover what those miss — and it covers the missing-receipt and concurrency story well. It omits authorization requirements and error/validation behavior, a minor residual gap for a destructive mutation.

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?

Schema description coverage is 100% and the single 'name' parameter already documents length bounds and the non-space-character rule, so the schema carries the load. The description adds no syntax, format, or constraint detail beyond it; baseline 3 applies.

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 ('Changes only this Workspace's name') plus an explicit scope boundary ('all other settings are preserved'), which distinguishes it from other workspace/settings tools in the sibling list without naming them. An agent can tell exactly what this does and what it does not touch.

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 actionable context for the ambiguous case: after a lost response, call workspace_read to check state, and be aware retry may overwrite concurrent edits. It names an alternative tool with a condition, though it never states outright when to prefer this tool over other edit tools or what preconditions (permissions) apply.

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