list_component_families

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

The description discloses that the output is automatically stored and returns an object ID, which is a behavioral trait beyond a simple list. However, it does not explicitly state that the operation is read-only or non-destructive, which would be expected for a list tool. The annotations are absent, so the description carries the burden.

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 somewhat redundant with repeated mentions of storing output and object ID. It could be more concise, but it is still relatively efficient and front-loaded with the main purpose.

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?

Given zero parameters and no output schema, the description explains the tool's basic operation and how to use the result. However, it lacks guidance on when to choose this tool over similar siblings and does not mention error conditions or limits.

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 has zero parameters and schema description coverage is 100%, so no additional parameter info is needed. Baseline is 4, and the description does not repeat any schema details.

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 clearly states that the tool lists all Haystack component families available on deepset, which is a specific verb+resource. However, it does not explicitly distinguish this tool from siblings like get_component_definition or search_component_definitions, though the purpose is still clear.

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 provides no guidance on when to use this tool versus alternatives. It does not state any preconditions, exclusions, or compare with sibling tools. The only usage hint is implicit: to list all families, but no when-not-to-use.

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