Fetch the public MarketWatch editorial section inventory to retrieve the list of available sections for finance data access.
Get MarketWatch sections. Returns the public MarketWatch editorial section inventory.
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Changes observed during successful MCP inspections.
v1.17.5Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden. It states the tool returns an inventory, which implies a read-only operation, but it does not disclose any other behavioral traits (e.g., pagination, output format, or potential side effects). For a simple getter, this is adequate but minimal.
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?
Two short sentences with no fluff. The primary action and return value are front-loaded, and every word earns its place.
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 low complexity (no parameters, no output schema), the description is sufficient for an agent to understand the tool's purpose. It could benefit from noting the structure of the returned inventory, but for a simple list tool this is adequate.
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, so the description need not explain parameter meaning. The baseline for zero-parameter tools is 4, and the description adds no parameter-specific details, which is appropriate.
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 gets MarketWatch sections and explicitly defines the return value as the 'public MarketWatch editorial section inventory.' The verb 'Get' plus the resource 'MarketWatch sections' distinguishes it from sibling section tools for other publishers.
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?
No explicit guidance on when to use this tool versus alternatives. The context is obvious (use for MarketWatch sections only), but the description does not mention exclusions or name a preferred alternative, leaving some inference required.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.