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CohenD

fin-data-mcp-server

by CohenD

Search Manifold prediction markets

manifold_search_markets
Read-onlyIdempotent

Search crowd-sourced prediction markets by term to retrieve probability forecasts on topics like politics, economics, and tech.

Instructions

Full-text search Manifold markets by term. Returns probability forecasts for crowd-sourced predictions across politics, economics, tech, etc.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sortNo
termYesSearch query
limitNo
Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description's burden is low. The description adds that it returns probability forecasts, which is useful context but not extensive. No behavioral contradictions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence that front-loads the core action. It is efficient, though adding a structured breakdown of parameters or return format could improve clarity without excessive length.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema and only a brief description, the tool lacks completeness. It does not explain what the returned probability forecasts look like, pagination, or result format. For a search tool, more detail is needed to understand the output.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is only 33% (only 'term' has a description). The description does not explain the 'sort' or 'limit' parameters beyond what the schema provides. For a tool with low schema coverage, the description should compensate but fails to add meaningful parameter semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool performs full-text search on Manifold markets by term and returns probability forecasts. It distinguishes from sibling tools like manifold_list_markets (listing without search) and manifold_get_market (single market). The resource and action are specific.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

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 does not mention exclusion criteria or contrast with similar tools such as manifold_list_markets or dbnomics_search. The usage context is only implied.

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

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