MCP Gemini API Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. 'Set configuration value' implies a write/mutation operation but provides no information about permissions required, whether changes are persistent or reversible, potential side effects, error conditions, or rate limits. For a mutation tool with zero annotation coverage, this represents a significant gap in behavioral transparency.

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: 'Set configuration value'. While this represents under-specification in terms of content, from a pure conciseness perspective it's maximally efficient with zero wasted words. Every word earns its place in conveying the core function.

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 configuration mutation tool with no annotations and no output schema, the description is incomplete. It doesn't explain what happens after setting the configuration, whether the change is immediate or requires restart, what format the value should be in, or what systems are affected. Given the complexity of configuration management and the lack of structured metadata, the description should provide more context about the operation's scope and effects.

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 both parameters ('key' and 'value') clearly documented in the schema itself. The description adds no additional parameter information beyond what's already in the structured schema. According to the scoring rules, when schema_description_coverage is high (>80%), the baseline is 3 even with no param info in the description.

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 'Set configuration value' is a tautology that essentially restates the tool name 'set_config' without adding meaningful specificity. It doesn't distinguish what kind of configuration, for what system, or how this differs from sibling tools like 'get_config'. While it includes a verb ('Set') and resource ('configuration value'), it lacks the specificity needed for clear differentiation.

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 the sibling 'get_config' tool for retrieving configuration values, nor does it indicate any prerequisites, constraints, or appropriate contexts for setting configuration. There's no explicit or implied guidance about when this operation should be performed.

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