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Neuronpedia MCP Server

Neuronpedia MCP Server

by manncodes
OverviewSchemaSourceRelated ServersDiscussionsAdmin
JavaScript

create_vector

Create a custom vector for steering AI model behavior by specifying name, values, and optional steering strength.

Instructions

Create a custom vector for steering

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": {
      "name": "<name>",
      "values": "<values>"
    },
    "name": "create_vector"
  }
}

Input Schema

NameRequiredDescriptionDefault
nameYesVector name
valuesYesVector values
steeringStrengthNoOptional steering strength

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.4/5.0
Behavior2/5

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

With no annotations provided, the description must disclose behavioral traits. It only states the action, not side effects (e.g., resource creation, persistence), permissions required, or idempotency. This is insufficient for a creation tool.

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 sentence, concise and front-loaded. No unnecessary words.

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?

The tool has 3 parameters, no output schema, and no annotations. The description lacks details about what the tool returns, constraints (e.g., name uniqueness), or how it interacts with other tools like steer_generation. Incomplete for a creation operation.

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 baseline is 3. The description adds no additional meaning beyond the schema's own parameter descriptions (name, values, steeringStrength). It does not clarify the role of steeringStrength or value format.

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 'Create a custom vector for steering' clearly states the action (create) and the resource (custom vector) and its purpose (steering), which is distinct from sibling tools like list_vectors, get_vector, delete_vector, and steer_generation.

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

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit context or when-to-use guidance is provided. It is implied that this tool is used when you need to create a custom vector, but there is no mention of alternatives or prerequisites, leaving the agent to infer usage from the purpose 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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