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decrypt_obfuscated_strings

Decrypt obfuscated strings in binary files by scanning raw sections and recovering single-byte XOR, multi-byte cycling XOR, and additive rolling-key XOR encoded data.

Instructions

Automated string decryptor across raw binary sections. Recovers Single-byte XOR, Multi-byte cycling XOR, and Additive Rolling-Key XOR encrypted strings.

Input Schema

NameRequiredDescriptionDefault
binary_pathYesAbsolute path to target binary
max_candidatesNoMax candidate decrypted strings

Schema Changelog

Changes observed during successful MCP inspections.

  1. Added

TDQS

A3.5/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full behavioral burden. It mentions decryption schemes but does not state whether the tool is read-only, modifies the binary, requires specific permissions, or how results are returned; only the capability is disclosed.

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?

Two sentences, front-loaded with purpose and then scheme specifics, with zero wasted words. Every sentence contributes directly to understanding what the tool does.

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?

For a tool with no annotations and no output schema, the description is missing key contextual details: it does not explain the return format (e.g., candidate strings with offsets) or whether the operation is safe. It covers purpose and schemes but leaves behavioral and output expectations incomplete.

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 coverage is 100%, so the schema fully documents both parameters. The description adds no additional meaning about binary_path or max_candidates beyond what the schema already provides, matching the baseline of 3.

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?

States a specific verb (decrypt) and resource (obfuscated strings), scoped to raw binary sections, and names three concrete encryption schemes. This clearly distinguishes it from sibling tools like detect_crypto_primitives and scan_byte_entropy.

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?

Implies usage for recovering strings from binaries via static analysis, but gives no explicit when-to-use, when-not-to-use, or alternatives (e.g., dynamically_unpack_binary, detect_crypto_primitives). An agent must infer the applicable context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.