moex-mcp

get_bond_yield_curve

Retrieve zero-coupon yield curve (ZCYC) data for bonds from Moscow Exchange. Specify a date for historical curves or use the default to get the latest available.

Instructions

Get zero-coupon yield curve (ZCYC) data for bonds

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "get_bond_yield_curve"
  }
}

Input Schema

Name	Required	Description	Default
`date`	No	Date (YYYY-MM-DD). Defaults to latest available
`engine`	No	Trading engine (default 'stock')	stock

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.0.0Aug 30, 2026

TDQS

B3.1/5.0

Behavior2/5

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

No annotations are provided, so the description carries the full burden. 'Get' implies a read operation, but the description does not disclose return shape, pagination, default behavior, side effects, or other behavioral traits beyond the verb.

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

Conciseness5/5

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

The description is a single, front-loaded sentence with no filler. Every word contributes to the tool's purpose, and it is appropriately sized for a simple data-retrieval operation.

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

Completeness3/5

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

For a two-parameter read-only tool, the description conveys the core resource, but without an output schema it omits return-shape hints and usage context. It is adequate but not rich enough to fully guide an agent in selecting and invoking the tool correctly.

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

Parameters3/5

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

Schema description coverage is 100%, so the baseline for this dimension is 3. The description itself adds no parameter-level meaning beyond what the schema already provides for 'date' and 'engine'.

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

Purpose4/5

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

The description states a specific verb and resource: 'Get zero-coupon yield curve (ZCYC) data for bonds.' This is clear and distinguishable from most siblings, though it does not explicitly position itself against get_coupons or other bond-related tools.

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?

There is no guidance on when to use this tool versus alternatives. The description does not mention conditions, exclusions, or related tools, so an agent must infer the appropriate context from the name alone.

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