notebooklm_set_metadata

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

With no annotations, the description carries the full burden of disclosing behavior, but only states that metadata is 'set'. It does not explain whether existing metadata is replaced or merged, whether any validation is performed, or what side effects occur. This is a significant gap for a mutating operation.

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 description is a single, front-loaded sentence with no filler words. It conveys the core purpose efficiently without 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?

The tool has three required parameters including a nested metadata object, no output schema, and no annotations, yet the description provides only a high-level purpose. It does not cover semantics of 'set' (merge vs. replace), metadata shape constraints, or error behavior. This leaves an agent without enough context to invoke the tool correctly.

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?

The input schema already describes all three parameters ('Resource ID', 'Type of resource', 'Metadata to set'), so schema coverage is complete. The tool description adds little beyond the schema, except confirming the type parameter selects a notebook or source. Baseline of 3 is appropriate.

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 uses a specific verb ('set') and resource ('metadata') and enumerates the target resource types ('notebook or source'), making it clear what the tool does. It distinguishes from siblings such as get_metadata and query_metadata through the 'set' verb, though it does not explicitly name alternatives. Overall clear and unambiguous.

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 offers no guidance on when to choose this tool over siblings like validate_metadata or query_metadata. No conditions, prerequisites, or exclusions are provided. The only implied usage is from the verb 'set', which is not enough.

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