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

Annotations already declare it as a non-destructive, non-open-world mutation, so the safety profile is covered. What's missing is anything the annotations can't say: what a "draft" state means, whether the space is immediately visible, what happens to the delegated principal's identity, or whether the call is idempotent. "Synthetic" is never explained.

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 well-formed sentence with no filler, which is structurally clean. But brevity here is the product of under-specification rather than economy — the sentence is short because it says almost nothing.

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 mutating create tool with four undocumented parameters, no output schema, and only baseline annotations, the description is far too thin. An agent would be guessing at both the effect and the argument values before calling it.

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?

Four parameters with 0% schema description coverage and the description mentions none of them. Required fields purpose and visibility, the private/unlisted/public enum meaning, and the roles of town and token are entirely undocumented anywhere.

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 verb+resource pair ("Create a ... draft Space") is identifiable, but the qualifiers "synthetic" and "for the delegated principal" are internal jargon that don't clarify what kind of space results. It also gives no signal distinguishing it from siblings like spaces_get or spaces_list_public, which sit adjacent in the namespace.

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?

There is no statement of when to use this over other space-related tools, no precondition (e.g., authentication or delegation requirement), and no exclusion criteria. The agent must infer everything from the name.

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