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mrphrazer

Binary Ninja Headless MCP

by mrphrazer

annotation.rename_data_var

Rename a data variable at a specific address in a binary analysis session to a new name, clarifying the purpose of data in reverse engineering.

Instructions

Rename data variable.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
addressYes
new_nameYes
session_idYes
Behavior1/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. It only states 'Rename', implying mutation, but fails to mention effects on cross-references, error handling, permissions, or reversibility. This is critically insufficient.

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

Conciseness3/5

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

The description is a single sentence, which is concise, but it is under-specified to the point of being unhelpful. It is front-loaded but lacks necessary detail, so conciseness does not compensate for missing information.

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 absence of annotations, output schema, and parameter descriptions, the description is severely incomplete. It provides no information about return values, side effects, constraints, or error scenarios, leaving the tool largely opaque.

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 description coverage is 0%, and the description adds no meaning to the three parameters (session_id, address, new_name). It does not explain what address formats are acceptable (integer vs string) or any naming conventions for new_name, leaving the agent without guidance.

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

Purpose2/5

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

The description 'Rename data variable' states a verb and resource but does not differentiate from sibling tools like annotation.rename_function or annotation.rename_symbol. It lacks specificity about what constitutes a 'data variable' in this context, making the purpose vague for an AI agent.

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

Usage Guidelines1/5

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

No usage guidelines are provided. The description does not indicate when to use this tool over alternatives, such as when renaming a function or symbol, nor does it mention any prerequisites or context.

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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