cas_caslibs

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

The readOnlyHint=true annotation already establishes that this is a safe, non-mutating read, so the description carries a lighter burden. It usefully adds what the returned caslib records contain (type, description, path, and database for SingleStore caslibs), but says nothing about scoping, pagination, or whether all caslibs or a filtered subset are returned.

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?

A single tight sentence with no filler; the resource is front-loaded and the field list follows immediately. Every clause earns its place.

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 zero-parameter, read-only listing tool with no output schema, the description does the essential work by naming the fields returned. It stops short of describing scope (all caslibs? per connection?) or result shape, which is the only meaningful remaining gap.

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 tool takes zero parameters, so per the rubric the baseline is 4. The description introduces no parameter concepts that could conflict with the empty schema, and there is nothing for it to clarify.

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 identifies a specific resource (caslibs on the CAS server) and enumerates the fields returned, which distinguishes it from sibling listing tools such as list_databases, cas_tables, and cas_columns. It lacks an explicit verb ('list'/'retrieve'), but the noun-phrase-plus-fields phrasing makes the operation 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?

There is no statement of when to use this tool versus the many other metadata/schema-exploration siblings (schema_explorer_databases, list_databases, cas_tables, sas_libraries). No prerequisites or exclusions are given; the agent must infer usage from the name alone.

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