pinecone_list_namespaces

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

With no annotations, the description carries the full burden. 'List' implies a read-only, non-destructive operation and it discloses that record counts are returned 'where available', which is useful partial output context, but it says nothing about permissions, pagination, or limits on a potentially large namespace set.

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 front-loaded sentence with zero filler. The subject and scope come first, and the qualifier 'where available' is the only additional detail, which is worth keeping.

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?

An output schema exists, so return-value explanation is not required, and the single-parameter invoke is simple. What is missing is routing context relative to the many sibling namespace and index tools, leaving the agent to guess when this is the right call.

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 0% and the single 'index' parameter is undocumented in the schema, so the description must compensate. However, the parameter name 'index' is largely self-explanatory and the description implies the scope ('in an index'), so the gap is minor rather than severe.

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 (List) and resource (namespaces) scoped to an index, which distinguishes it from siblings like pinecone_describe_namespace and pinecone_create_namespace. It does not explicitly name those alternatives, so it stops short of a 5.

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?

There is no guidance on when to use this versus pinecone_describe_namespace, pinecone_describe_index_stats, or pinecone_list_indexes. The agent must infer that this is for enumerating namespaces without additional detail.

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