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blpapi-mcp

blpapi-mcp

by djsamseng
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

bds

Retrieve Bloomberg block data by specifying tickers and fields. Optionally enable portfolio usage or pass additional parameters.

Instructions

Get Bloomberg block data

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "tickers": "<tickers>",
      "flds": "<flds>"
    },
    "name": "bds"
  }
}

Input Schema

NameRequiredDescriptionDefault
tickersYes
fldsYes
use_portNo
kwargsNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2/5.0
Behavior2/5

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

With no annotations, the description must convey behavioral traits, but it only says 'Get', suggesting a read operation. No details on idempotency, side effects, authentication, or rate limits are given.

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

Conciseness2/5

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

The description is extremely short but under-specified. While brevity is acceptable, it sacrifices valuable information, making it inadequate for effective tool invocation.

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

Completeness1/5

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

Given the tool complexity (4 parameters, 2 required, no output schema) and minimal description, the context is insufficient. The agent lacks guidance on input format, return value, and tool behavior.

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

Parameters1/5

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

Schema coverage is 0%, and the description fails to explain any parameter. It does not clarify what 'tickers', 'flds', 'use_port', or 'kwargs' mean, leaving the agent without necessary context to use the tool correctly.

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

Purpose3/5

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

The description 'Get Bloomberg block data' specifies a verb and resource, but 'block data' is ambiguous and does not clearly differentiate from sibling tools like bdh or bdp. A more explicit definition of what block data entails would improve clarity.

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?

No guidance is provided on when to use bds versus its siblings, nor any context about prerequisites or limitations. The agent is left to infer the tool's role 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.

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