bunny_list_mc_registries

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safe read-only behavior is established. The description adds context about the role of registry credentials but does not disclose response behavior, pagination, errors, or auth requirements beyond what annotations supply.

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?

Two sentences with no filler. The first sentence front-loads the action and resource, and the second sentence adds meaningful deployment context 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?

For a zero-parameter, safely read-only list tool, the description is sufficient: it identifies the resource, gives examples, and explains practical relevance. It does not describe the exact output shape, but the list-oriented purpose and openWorldHint make this a minor 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 input schema has no parameters, so there is nothing for the description to elaborate on. The zero-parameter baseline of 4 applies, and the description still usefully clarifies what kind of registries are listed.

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 names a specific verb ('List'), a specific resource ('container registries configured for pulling Docker images'), and gives concrete examples (Docker Hub, GHCR, custom registries). This clearly separates it from sibling list tools such as bunny_list_mc_apps or bunny_list_regions.

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 statement that registry credentials are used when deploying private container images implies a use case, but it does not explicitly say when to use this tool versus alternatives or when not to use it. No sibling comparison or exclusionary guidance is provided.

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