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Hex-Rays IDA MCP

Hex-Rays IDA MCP

by zy723
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

Read strings from memory

get_string
Read-only

Read strings from memory addresses in a binary for reverse engineering. Supply addresses to extract associated text data.

Instructions

Read strings from memory addresses

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": {
      "addrs": "<addrs>"
    },
    "name": "get_string"
  }
}

Input Schema

NameRequiredDescriptionDefault
addrsYesAddresses to read strings from
instance_idNoOptional database instance id. If omitted, use the current target.

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv20261008.0.1

TDQS

C2.6/5.0
Behavior2/5

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

With readOnlyHint=true already declaring the safety profile, the description adds nothing behavioral: it does not say what encoding/null-termination is assumed, how invalid or unmapped addresses are handled, or whether multiple addrs produce per-address results. It merely restates the annotation-backed read semantics.

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?

It is a single short, front-loaded phrase with no filler, which is structurally fine. The terse phrasing, however, leaves key semantics unspecified rather than being economically complete, so it only meets the minimum bar.

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?

An output schema exists, so return-value shape need not be described, and the annotations cover safety. What remains missing is the string-reading semantics a reverse-engineering agent needs (encoding, terminators, failure behavior), which is material for a tool whose whole purpose is decoding strings from raw addresses.

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 both addrs and instance_id are already documented in the schema, giving a baseline of 3. The description adds no syntax, format, or batching detail beyond 'memory addresses', so it does not exceed the baseline.

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 states a verb and resource (read strings) and the source (memory addresses), so the basic action is unambiguous. However, it is essentially a restatement of the title 'Read strings from memory' and offers no differentiation from close siblings like get_bytes, get_int, get_global_value, or get_dynamic_string_map. An agent cannot tell from the text why it would pick this over those.

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 when-to-use guidance, no statement of prerequisites, and no mention of alternatives among the many memory-reading siblings. The agent must infer entirely from the name that this is the string-specific counterpart to get_bytes/get_int.

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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