mcp-highcharts

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

The annotation provides readOnlyHint=true, indicating this is a safe read operation. The description adds context by specifying it renders a data table as a standalone component, which is useful beyond the annotation. However, it doesn't disclose other behavioral traits like performance considerations, error handling, or output format details, leaving room for improvement.

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 with just two short sentences that directly state the tool's purpose and key constraint ('no chart required'). Every word earns its place, and it's front-loaded with essential information without any fluff or 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?

Given the high complexity (11 parameters, nested objects) and lack of output schema, the description is somewhat incomplete. It explains what the tool does but doesn't cover return values, error cases, or detailed usage scenarios. With annotations only covering read-only status, more context would be helpful for effective tool 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?

With 100% schema description coverage, the input schema thoroughly documents all 11 parameters. The description adds no additional parameter semantics beyond what's in the schema, so it meets the baseline of 3. It doesn't compensate for any gaps because there are none, but also doesn't enhance understanding further.

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 clearly states the tool renders a 'Highcharts Grid Lite data table for tabular data display' and specifies it's a 'standalone component — no chart required', which distinguishes it from chart-related siblings. However, it doesn't explicitly differentiate from other non-chart siblings like render_dashboard or render_gantt, keeping it from a perfect score.

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 usage by stating it's for 'tabular data display' and 'standalone component — no chart required', which suggests when to use it (for tables without charts) versus alternatives like render_chart. However, it lacks explicit guidance on when not to use it or comparisons to other non-chart siblings, making the guidance incomplete.

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