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

Annotations already declare it is a non-read-only, non-destructive creation call, and the description adds genuinely useful behavioral context beyond that: the project is anonymous, it returns both a share link and an agent token that authorizes later edits. It still omits limits, whether the token expires, or whether project creation is rate-limited.

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 sentences, no filler, with the return values and creation modes front-loaded. It is dense to the point of being slightly clipped (the second sentence compresses three modes plus the aspect hint), but every clause carries information.

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 no output schema, the description correctly takes on explaining the return payload (link + agent token). For a 7-parameter, nested-object tool with zero required parameters, though, an agent still lacks guidance on defaults, on what 'anonymous' implies for ownership, and on the untouched name/locale/agentLabel parameters.

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% across 7 parameters, so the description must compensate, and it does so only partially. It usefully explains aspect ('9:16' makes a vertical Short) and identifies the template, example and actions sources, but leaves name, locale and agentLabel entirely undocumented.

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 ('Creates an anonymous project') and immediately discloses what is returned: a Studio link for the person plus an agent token for later edits. It also enumerates the three viable starting points (template, guide example, own actions), clearly distinguishing it from the sibling list/get helpers.

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?

It routes the agent to the right precursors by naming studio_list_templates, studio_list_examples and studio_get_guide in the context of each creation mode, which is strong when-to-use guidance. It does not state when *not* to use this tool (e.g., reusing an existing project via studio_join_project or editing via studio_apply_actions), so it falls short of a full 5.

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