Financial Analysis MCP Server

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

No annotations are provided, so the description carries full burden. It mentions the tool creates a plot and can optionally save it, but doesn't disclose important behavioral traits: whether it requires specific file permissions, what happens if the filename already exists, what image format is generated, or any performance/rate limit considerations. The description is minimal and lacks behavioral context.

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 appropriately sized and well-structured with clear sections for Args and Returns. Each sentence serves a purpose: stating the core function, listing parameters, and describing the return value. There's no wasted text, though the parameter explanations could be more detailed given the 0% schema coverage.

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 5-parameter tool with no annotations and no output schema, the description is incomplete. It doesn't explain the tool's behavior in detail, doesn't clarify when to use it versus sibling plotting tools, and provides minimal parameter guidance. The return format is mentioned but without schema details. Given the complexity and lack of structured documentation, the description should do more to help an agent understand this tool's proper use.

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?

Schema description coverage is 0%, so the description must compensate. It lists all 5 parameters with brief explanations, providing basic semantic meaning beyond the schema's property names. However, it doesn't explain parameter relationships (e.g., dates and values arrays must match in length), data formats (date string format, value types), or constraints (minimum array lengths). The description adds value but doesn't fully compensate for the schema's lack of descriptions.

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's purpose: 'Plots a financial metric over time.' This is a specific verb ('plots') with a clear resource ('financial metric') and temporal scope ('over time'). However, it doesn't explicitly differentiate from sibling tools like 'mcp_plot_comparison_chart' or 'mcp_plot_price_chart', which likely have overlapping charting functionality.

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. With multiple plotting tools in the sibling list (mcp_plot_comparison_chart, mcp_plot_price_chart, mcp_plot_trading_opportunities), there's no indication of what makes this tool distinct or when it's the appropriate choice over those other visualization tools.

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