graphviz_environment

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

Annotations already indicate a safe read-only operation. The description adds meaningful context beyond the annotations by disclosing that it reports capabilities, server paths, and an enforced layout constraint, giving the agent a clear picture of what the call reveals without contradicting the read-only hint.

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 a single, front-loaded sentence that enumerates three concrete items with no filler. Every word adds meaning and the structure makes the tool's purpose immediately clear.

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 simple, parameterless, read-only environment probe with an output schema, the description fully covers what the agent needs to know. It identifies the tool's purpose and the categories of information returned, and the output schema handles the rest.

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 has zero parameters and the input schema is empty with 100% coverage, so there is nothing for the description to document. The baseline of 4 applies because no additional parameter clarification is needed.

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?

Description uses a specific verb ('Report') and clearly specifies the resource (GraphViz environment) and the exact information returned: capabilities, server paths, and layout limits. This distinguishes it from siblings that validate, render, publish, or sync.

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 implies the tool is for inspecting the environment before layout operations, especially mention of enforced 5x5 limits, but it does not explicitly state when to prefer this over alternatives. No when-not-to-use guidance is provided.

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