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

Annotations already mark readOnlyHint=false, so the write nature is disclosed. The description adds that the project is 'private', a useful behavioral detail, but does not mention authentication, default workspace resolution, or any side effects beyond the creation 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 clean sentence delivers the core intent without waste. It front-loads the action and object, though given the 7-parameter surface, the description is relatively thin if not actively concise.

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?

The schema and output schema cover the parameter and return details. However, the description omits usage guidance (when to use vs alternatives) and does not clarify operational defaults or consequences like default workspace or private visibility, which would help an agent invoke it confidently.

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 100%, so all 7 parameters are already documented in the schema. The description adds no additional meaning or constraints about parameters (e.g., default aspectRatio, frameRate behavior) beyond what the schema provides.

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 states a specific action ('Create') and a specific resource ('new private BlitzReels video project'), which clearly identifies it as a creation tool for projects. It distinguishes from sibling read/list tools like projects_get and projects_list, though it doesn't explicitly name any alternative as another option.

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 guidance is given on when to use this tool versus alternatives such as workflow_runs_create or clips_create. There is no mention of prerequisites, idempotency usage, or scenarios where this should be preferred over other create tools.

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