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

Annotations provide readOnlyHint=false, destructiveHint=false, but no detailed safety profile. The description adds behavioral context about the returned webUrl and when to invoke a subsequent tool, which goes beyond 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?

The entire description is two short sentences, front-loaded with the core purpose and follow-up instruction. No filler or redundancy.

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 create tool with two string params and no output schema, the description gives the core purpose and a sharing hint. However, it omits prerequisites, error handling, and references a tool not in the sibling list, leaving the workflow slightly incomplete.

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% and the description does not explain the `name` or `description` parameters beyond their existence. It only hints at the response containing `space.webUrl`, not parameter semantics.

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 clearly states 'Create empty Space' with a specific verb and resource. It differentiates from sibling tools like magnific_spaces_edit and magnific_spaces_list, making the purpose unmistakable.

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?

The description provides a follow-up workflow: share `space.webUrl` and only call `spaces_show` when inline preview is requested. However, it does not explicitly contrast with alternative creation or editing tools, and references a 'spaces_show' tool not present in the sibling list, weakening its guidance.

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