get_libraries

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

No annotations, so the description carries the full burden. 'Read' implies a non-mutating operation, and 'public Plugin API' hints at an access path, but there is no disclosure of whether a session/plugin connection is required, whether results are cached, or what a 'library' object contains.

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 front-loaded sentence with no filler. The access-path qualifier is placed where it adds context without delaying the core statement.

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?

With no annotations and no output schema, the description is the only source of behavioral and return-value information, and it says nothing about what the returned libraries look like or how to use them. For a no-param discovery tool this leaves a real gap in understanding the result.

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 the baseline is 4. Nothing in the schema needs explanation, and the description doesn't introduce any confusing parameter-like language.

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 and resource: 'Read available team variable libraries'. The 'public Plugin API' qualifier narrows scope further. It doesn't explicitly differentiate from siblings like get_variable_defs or search_design_system, which touch the same variable/design-system domain.

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 on when to call this versus get_variable_defs, search_design_system, or get_design_context — all plausible alternatives for variable-related data. The agent must infer the distinction from names alone.

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