droidasc-mcp

by cnlnn

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Python

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asc_get_class_source

Read-only

Locate and decompile one Android APK class, returning a bounded page of source lines for targeted code inspection.

Instructions

Locate and decompile one class, returning a bounded page of source lines.

Input Schema

Name	Required	Description	Default
`limit`	No	Maximum result page size in rows or source lines, server-capped
`offset`	No	Zero-based result offset; graph traversal requires zero
`backend`	No	Engine; rust_asc is opt-in and reports unverified coverage	droidasc
`threads`	No	Positive ASC worker count; requested values above 32 are capped
`apk_path`	Yes	APK file path within configured allowed roots
`class_name`	Yes	Exact class descriptor or Java dotted class name

Output Schema

Name	Required	Description	Default
`xml`	No
`code`	No
`kind`	No
`items`	No
`limit`	No
`total`	No
`module`	No
`offset`	No
`source`	No
`status`	No
`backend`	No
`message`	No
`sources`	No
`apk_path`	No
`coverage`	No
`has_more`	No
`input_id`	No
`truncated`	No
`apk_sha256`	No
`class_name`	No
`session_id`	No
`limitations`	No
`next_offset`	No
`artifact_path`	No
`artifact_sha256`	No
`backend_version`	No
`selected_modules`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed12 schema fields changedv0.2.5Oct 29, 2026

addedOutput schema / $defs / DexRow / properties / target_index

Added value: +{
+  "title": "Target Index",
+  "type": "integer"
+}

addedOutput schema / $defs / Source / properties / container_sha256

Added value: +{
+  "title": "Container Sha256",
+  "type": "string"
+}

addedOutput schema / $defs / Source / properties / container_size_bytes

Added value: +{
+  "title": "Container Size Bytes",
+  "type": "integer"
+}

addedOutput schema / $defs / Source / properties / logical_header_offset

Added value: +{
+  "title": "Logical Header Offset",
+  "type": "integer"
+}

addedOutput schema / $defs / Source / properties / logical_size_bytes

Added value: +{
+  "title": "Logical Size Bytes",
+  "type": "integer"
+}

addedOutput schema / $defs / Source / properties / module

Added value: +{
+  "title": "Module",
+  "type": "string"
+}

addedOutput schema / $defs / Source / properties / normalization

Added value: +{
+  "title": "Normalization",
+  "type": "string"
+}

addedOutput schema / $defs / Source / properties / original_dex_version

Added value: +{
+  "title": "Original Dex Version",
+  "type": "string"
+}

addedOutput schema / $defs / Source / properties / snapshot_entry

Added value: +{
+  "title": "Snapshot Entry",
+  "type": "string"
+}

addedOutput schema / $defs / Source / properties / stored_size_bytes

Added value: +{
+  "title": "Stored Size Bytes",
+  "type": "integer"
+}

addedOutput schema / properties / module

Added value: +{
+  "title": "Module",
+  "type": "string"
+}

addedOutput schema / properties / selected_modules

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "title": "Selected Modules",
+  "type": "array"
+}

Changed9 schema fields changedv0.2.4Oct 27, 2026

changedInput schema / properties / limit / description

Previous value: -"Positive result page size in rows or source lines, server-capped"New value: +"Maximum result page size in rows or source lines, server-capped"

removedOutput schema / $defs / DexRow / properties / instruction_offset / anyOf

Removed value: -[
-  {
-    "type": "integer"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / $defs / DexRow / properties / instruction_offset / type
```
Added value: +[
+  "integer",
+  "null"
+]
```

removedOutput schema / $defs / DexRow / properties / offset_unit / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / $defs / DexRow / properties / offset_unit / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / $defs / DexRow / properties / target_dex_entry / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / $defs / DexRow / properties / target_dex_entry / type
```
Added value: +[
+  "string",
+  "null"
+]
```

removedOutput schema / properties / next_offset / anyOf

Removed value: -[
-  {
-    "type": "integer"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / next_offset / type
```
Added value: +[
+  "integer",
+  "null"
+]
```

Changed9 schema fields changedv0.2.3Oct 23, 2026

addedInput schema / properties / apk_path / description

Added value: +"APK file path within configured allowed roots"

addedInput schema / properties / backend

Added value: +{
+  "default": "droidasc",
+  "description": "Engine; rust_asc is opt-in and reports unverified coverage",
+  "enum": [
+    "droidasc",
+    "rust_asc"
+  ],
+  "title": "Backend",
+  "type": "string"
+}

addedInput schema / properties / class_name / description

Added value: +"Exact class descriptor or Java dotted class name"

addedInput schema / properties / limit / description

Added value: +"Positive result page size in rows or source lines, server-capped"

addedInput schema / properties / offset / description

Added value: +"Zero-based result offset; graph traversal requires zero"

addedInput schema / properties / threads / description

Added value: +"Positive ASC worker count; requested values above 32 are capped"

addedOutput schema / $defs

Added value: +{
+  "DexRow": {
+    "additionalProperties": true,
+    "properties": {
+      "access": {
+        "enum": [
+          "read",
+          "write"
+        ],
+        "title": "Access",
+        "type": "string"
+      },
+      "access_flags": {
+        "title": "Access Flags",
+        "type": "integer"
+      },
+      "call_site_prototype": {
+        "title": "Call Site Prototype",
+        "type": "string"
+      },
+      "callee": {
+        "title": "Callee",
+        "type": "string"
+      },
+      "caller": {
+        "title": "Caller",
+        "type": "string"
+      },
+      "class_name": {
+        "title": "Class Name",
+        "type": "string"
+      },
+      "descriptor": {
+        "title": "Descriptor",
+        "type": "string"
+      },
+      "detail": {
+        "title": "Detail",
+        "type": "string"
+      },
+      "dex": {
+        "title": "Dex",
+        "type": "string"
+      },
+      "dex_entry": {
+        "title": "Dex Entry",
+        "type": "string"
+      },
+      "dispatch_kind": {
+        "title": "Dispatch Kind",
+        "type": "string"
+      },
+      "field_descriptor": {
+        "title": "Field Descriptor",
+        "type": "string"
+      },
+      "has_code": {
+        "title": "Has Code",
+        "type": "boolean"
+      },
+      "instruction": {
+        "title": "Instruction",
+        "type": "string"
+      },
+      "instruction_offset": {
+        "anyOf": [
+          {
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "title": "Instruction Offset"
+      },
+      "kind": {
+        "title": "Kind",
+        "type": "string"
+      },
+      "matched": {
+        "title": "Matched",
+        "type": "string"
+      },
+      "method": {
+        "title": "Method",
+        "type": "string"
+      },
+      "method_descriptor": {
+        "title": "Method Descriptor",
+        "type": "string"
+      },
+      "name": {
+        "title": "Name",
+        "type": "string"
+      },
+      "offset_unit": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "title": "Offset Unit"
+      },
+      "opcode": {
+        "title": "Opcode",
+        "type": "string"
+      },
+      "parameter_types": {
+        "items": {
+          "type": "string"
+        },
+        "title": "Parameter Types",
+        "type": "array"
+      },
+      "raw": {
+        "title": "Raw",
+        "type": "string"
+      },
+      "reason": {
+        "title": "Reason",
+        "type": "string"
+      },
+      "relation": {
+        "title": "Relation",
+        "type": "string"
+      },
+      "return_type": {
+        "title": "Return Type",
+        "type": "string"
+      },
+      "source": {
+        "title": "Source",
+        "type": "string"
+      },
+      "storage": {
+        "enum": [
+          "static",
+          "instance"
+        ],
+        "title": "Storage",
+        "type": "string"
+      },
+      "string": {
+        "title": "String",
+        "type": "string"
+      },
+      "string_index": {
+        "title": "String Index",
+        "type": "integer"
+      },
+      "target": {
+        "title": "Target",
+        "type": "string"
+      },
+      "target_dex_entry": {
+        "anyOf": [
+          {
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "title": "Target Dex Entry"
+      },
+      "target_resolution": {
+        "title": "Target Resolution",
+        "type": "string"
+      },
+      "type_descriptor": {
+        "title": "Type Descriptor",
+        "type": "string"
+      },
+      "value": {
+        "title": "Value",
+        "type": "string"
+      }
+    },
+    "title": "DexRow",
+    "type": "object"
+  },
+  "Source": {
+    "additionalProperties": true,
+    "properties": {
+      "container_entry": {
+        "title": "Container Entry",
+        "type": "string"
+      },
+      "declared_class_count": {
+        "title": "Declared Class Count",
+        "type": "integer"
+      },
+      "dex_entry": {
+        "title": "Dex Entry",
+        "type": "string"
+      },
+      "dex_version": {
+        "title": "Dex Version",
+        "type": "string"
+      },
+      "path": {
+        "title": "Path",
+        "type": "string"
+      },
+      "sha256": {
+        "title": "Sha256",
+        "type": "string"
+      },
+      "size_bytes": {
+        "title": "Size Bytes",
+        "type": "integer"
+      }
+    },
+    "title": "Source",
+    "type": "object"
+  }
+}

addedOutput schema / properties

Added value: +{
+  "apk_path": {
+    "title": "Apk Path",
+    "type": "string"
+  },
+  "apk_sha256": {
+    "title": "Apk Sha256",
+    "type": "string"
+  },
+  "artifact_path": {
+    "title": "Artifact Path",
+    "type": "string"
+  },
+  "artifact_sha256": {
+    "title": "Artifact Sha256",
+    "type": "string"
+  },
+  "backend": {
+    "title": "Backend",
+    "type": "string"
+  },
+  "backend_version": {
+    "title": "Backend Version",
+    "type": "string"
+  },
+  "class_name": {
+    "title": "Class Name",
+    "type": "string"
+  },
+  "code": {
+    "title": "Code",
+    "type": "string"
+  },
+  "coverage": {
+    "title": "Coverage",
+    "type": "string"
+  },
+  "has_more": {
+    "title": "Has More",
+    "type": "boolean"
+  },
+  "input_id": {
+    "title": "Input Id",
+    "type": "string"
+  },
+  "items": {
+    "items": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "$ref": "#/$defs/DexRow"
+        }
+      ]
+    },
+    "title": "Items",
+    "type": "array"
+  },
+  "kind": {
+    "title": "Kind",
+    "type": "string"
+  },
+  "limit": {
+    "title": "Limit",
+    "type": "integer"
+  },
+  "limitations": {
+    "items": {
+      "type": "string"
+    },
+    "title": "Limitations",
+    "type": "array"
+  },
+  "message": {
+    "title": "Message",
+    "type": "string"
+  },
+  "next_offset": {
+    "anyOf": [
+      {
+        "type": "integer"
+      },
+      {
+        "type": "null"
+      }
+    ],
+    "title": "Next Offset"
+  },
+  "offset": {
+    "title": "Offset",
+    "type": "integer"
+  },
+  "session_id": {
+    "title": "Session Id",
+    "type": "string"
+  },
+  "source": {
+    "title": "Source",
+    "type": "string"
+  },
+  "sources": {
+    "items": {
+      "$ref": "#/$defs/Source"
+    },
+    "title": "Sources",
+    "type": "array"
+  },
+  "status": {
+    "enum": [
+      "ok",
+      "partial",
+      "error",
+      "not_applicable"
+    ],
+    "title": "Status",
+    "type": "string"
+  },
+  "total": {
+    "title": "Total",
+    "type": "integer"
+  },
+  "truncated": {
+    "title": "Truncated",
+    "type": "boolean"
+  },
+  "xml": {
+    "title": "Xml",
+    "type": "string"
+  }
+}

changedOutput schema / title

Previous value: -"asc_get_class_sourceDictOutput"New value: +"LegacyResult"

First observedv0.1.1Sep 20, 2026

TDQS

A3.6/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and closed-world scope, so the safety profile is covered. The description adds useful context that results are paginated and bounded, but says nothing about decompilation cost, failure modes for an unknown class, or backend trade-offs that the schema hints at.

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?

A single front-loaded sentence with zero filler; the core action and the paged return are both delivered up front.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With a full output schema, return-value documentation is unnecessary, and the description covers scope and pagination adequately. It could go further on error behavior for missing classes and on the backend choice, but nothing essential to a correct call is missing.

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 all six parameters are documented in the schema itself, establishing a baseline of 3. The phrase "bounded page of source lines" reinforces the limit/offset semantics but adds no syntax or constraint detail beyond what the schema already provides.

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?

States a specific verb+resource pair ("decompile one class") and the return shape ("bounded page of source lines"). The singular framing implicitly distinguishes it from asc_list_classes, but no sibling is named explicitly.

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?

Usage is only implied: an agent can infer this is the tool for pulling the source of a specific class rather than enumerating classes. There is no explicit when-to-use/when-not or pointer to alternatives like asc_find_refs or asc_list_classes, and no mention of what to do if the class is not found.

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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