Check Vision Helper MCP Configuration

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

Annotations already declare readOnlyHint and idempotentHint, so the safety profile is known. The description adds valuable behavioral context: it reports the key source, masks the key (never shown in full), lists report contents, and explains the default model. It neither contradicts annotations nor omits important side effects (there are none).

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 well-structured with a clear first sentence, then bullet-point-like sections for args, returns, and examples. Every sentence adds useful information, though some formatting could be tighter. It is appropriately sized for the tool's simplicity.

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?

Since there is no output schema, the description fully compensates by detailing the markdown report contents: API key presence and source, default model, MAX_IMAGE_SIZE, and timeout. It also includes a concrete usage example. For a diagnostic tool with zero parameters, this is complete and self-sufficient.

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 schema is empty. The description explicitly states 'Args: (none)', which is clear. With no parameters, the baseline for parameter semantics is 4, and the description confirms the lack of arguments without extra fluff.

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 uses the specific verb 'Diagnose' with a clear resource (vision analysis config), and explicitly distinguishes itself from sibling tools by focusing on configuration state rather than performing analysis (vision_helper_analyze_image) or listing models (vision_helper_list_models). The purpose is unambiguous.

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 gives an explicit when-to-use scenario: when vision_helper_analyze_image fails with 'No OpenRouter API key found'. It also states what it confirms (where keys are or are not configured). It does not explicitly mention when not to use it or name alternative tools, but the context is clear and actionable.

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