Docker MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. 'List Docker images' implies a read-only operation, but it doesn't specify whether this requires specific permissions, how results are formatted (e.g., JSON, table), if there's pagination, or what happens on errors. For a tool with zero annotation coverage, this leaves critical behavioral traits undocumented.

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 extremely concise at just three words ('List Docker images'), with zero wasted language. It's front-loaded and directly states the core functionality without unnecessary elaboration, making it efficient and easy to parse.

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 the lack of annotations and output schema, the description is incomplete for effective tool use. It doesn't explain what the tool returns (e.g., image IDs, tags, sizes), how results are structured, or any behavioral nuances. For a listing tool in a Docker context with multiple similar siblings, more context is needed to distinguish it and guide proper invocation.

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 100% description coverage, with the single parameter 'all' fully documented in the schema itself ('Show all images (default hides intermediate)'). The description adds no additional parameter information beyond what the schema provides, so it meets the baseline score of 3 for high schema coverage without compensating value.

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 'List Docker images' clearly states the verb ('List') and resource ('Docker images'), making the tool's purpose immediately understandable. However, it doesn't differentiate this from sibling tools like 'list_containers', 'list_networks', or 'list_volumes', which all follow the same 'list [resource]' pattern without specifying what distinguishes listing images from listing other Docker resources.

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 doesn't mention prerequisites (e.g., Docker daemon running), compare it to similar tools like 'inspect_container' for detailed views, or explain why one might list images instead of containers. With multiple sibling listing tools, this lack of differentiation leaves usage context unclear.

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