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

Beyond the annotations (readOnlyHint=false, destructiveHint=false), the description discloses that call runs a tool exactly like a direct call with the same gates, charges, and errors, and that the meta-call itself changes no media or EDL. That is useful behavioral context. It doesn't describe return payloads for the list/describe modes, but call mode is well covered.

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?

Three sentences, front-loaded with the trigger and followed by mode-specific behavior and constraints. Every sentence carries information; phrasing is dense but not padded.

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 meta-tool with no output schema, it covers the main modes and the key rule that it's not a tool limit and doesn't mutate media. The openWorldHint=false annotation and schema descriptions fill remaining gaps; a mention of error behavior when describe names are unknown would make it complete.

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 75%, and the description reinforces semantics: domains select which catalog sections, describe=[names] returns current schemas, call={name, arguments} executes. It also notes the project_id constraint is covered in the schema description. Minor room to clarify the interplay when both describe and call are supplied or when domains is empty.

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 meta-tool that loads additional tool schemas and can list, describe, or call any tool by domain or name. It clearly distinguishes itself from the many concrete editing siblings (add_*, remove_*, set_*). The purpose is clear, though the opening phrase 'load additional tool schemas' slightly undersells the call capability that is elaborated later.

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 gives an explicit trigger: use when the compact catalog does not expose a capability you need, and it prescribes the workflow (request relevant domains, then continue immediately). It also clarifies scope with 'this is not a tool limit' and 'changes no media or EDL', so an agent knows when to reach for it and when not to.

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