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mrphrazer

Binary Ninja Headless MCP

by mrphrazer

segment.remove_user

Remove a user-defined segment from the Binary Ninja database by specifying its starting address and optional length.

Instructions

Remove user segment.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
startYes
lengthNo
session_idYes
Behavior2/5

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

With no annotations and no output schema, the description carries full burden for behavioral transparency. It only says 'Remove user segment,' which implies mutation, but fails to disclose whether the action is reversible, requires specific permissions, affects other segments or sessions, or changes the binary structure. The agent is left guessing about consequences.

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 sentence with zero wasted words. It is front-loaded and efficient. However, it is so brief that it sacrifices necessary detail, which lowers the score from a perfect 5.

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 operates in a binary analysis context (siblings like binary.segments, memory operations) with 3 unexplained parameters, no output schema, and no annotations, a 2-word description is grossly inadequate. The agent lacks critical information about what a 'user segment' is, which segment gets removed, what happens to the session, or how to undo. It is the weakest link in an otherwise rich tool ecosystem.

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 does not mention any parameters. No meaning is added beyond the raw type/required constraints in the schema. The three parameters ('session_id', 'start', 'length') remain completely unexplained—the agent does not know what each represents or how to use them together.

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 'Remove user segment' clearly states a specific verb ('Remove') and resource ('user segment'), directly aligning with the tool name. It distinguishes this tool from its sibling 'segment.add_user' and related section tools, as well as other modify operations like memory.remove and annotation.undefine_symbol.

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 usage context is provided—there is no explanation of when to remove a user segment versus alternatives. Given siblings like 'section.remove_user', 'memory.write', 'patch.convert_to_nop', and 'undo.begin', the agent could easily misuse or confuse this tool without guidance on prerequisites, typical scenarios, or exclusions.

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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