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

Annotations already declare idempotentHint=true and destructiveHint=false; the description reinforces this with concrete behavior: generate/persist keys first, reuse on retries, no purchase side effect, a returned header must be configured in the host, and keys must never go in checkpoints. That is meaningful context beyond the annotations, though it never confirms the created workspace's persistence or auth requirements.

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 with the core action and preconditions, then sequences the follow-up (configure header, reconnect). Dense and largely waste-free, with the only weak spot being the terse fragment 'Does not buy anything.' which reads abruptly.

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 5-parameter mutation with no output schema and 0% schema coverage, the description usefully flags the returned header and key-handling rules, but it leaves three parameters unexplained and does not describe the workspace created or what happens on partial failure. Adequate but with clear gaps.

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 0%, so the description carries the full parameter burden, yet it only alludes to 'both keys' (owner_key/agent_key) with a generate-before-call instruction. label, task_scope, and accept_terms are left entirely to the pattern/const constraints in the schema with no semantic explanation.

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: 'Create a free workspace.' The 'free' qualifier and the term-authorization condition clearly separate it from a paid/upgrade path, though no sibling tool is named explicitly. An agent can tell register apart from checkpoint/list/resume without opening schemas.

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?

Provides a real precondition ('only when the user has authorized external storage and the published terms'), a negative scope signal ('Does not buy anything'), and retry guidance ('reuse them on retries'). It does not name request_upgrade as the alternative for paid tiers, so it stops short of explicit when/when-not routing.

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