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

Annotations already declare this is a non-readonly, non-idempotent, non-destructive mutation, so the safety profile is covered. The description adds a genuinely useful account-level quota (max 100), but says nothing about duplicate-name behavior, required permissions/plan, or what is created (and returned) beyond the record itself.

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?

One sentence with the action front-loaded and no filler. The parenthetical quota is compact, though the "e.g." example sits slightly awkwardly against the hard limit in the same clause.

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 one-parameter create tool with full schema coverage and clear annotations, the description covers what is created and the account cap. Remaining gaps (duplicate-name handling, plan prerequisites) are minor for this complexity level and no output schema exists to document returns.

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 coverage is 100% and the single `name` parameter is fully documented with a 60-character limit, so the schema carries the burden. The description only adds the "company name" example; its "max 100 per account" refers to workspace count, not name length, so it adds no parameter-level detail beyond the schema.

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 client workspace") and clarifies what a workspace represents via the company-name example. It is clearly distinct from rename_workspace and delete_workspace, though it doesn't explicitly name those siblings.

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?

No indication of when to create a workspace versus using an existing one (e.g., list_workspaces first) or how it relates to siblings like add_contacts or move_mailbox_to_workspace. The only constraint offered is the 100-per-account quota, which is a limit rather than usage guidance.

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