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asc_open_dex_session

Validate and snapshot DEX files to create an immutable hash-bound session for safe analysis; reopen with new inputs when source files change.

Instructions

Validate and snapshot DEX inputs once; return an immutable hash-bound session.

Reuses the validated bundle, not a resident engine. Idle sessions expire and may be evicted at capacity. Source file changes require opening a new session.

Input Schema

Name	Required	Description	Default
`dex_paths`	Yes	Ordered standard DEX file paths; combined bytes are server-bounded

Output Schema

Name	Required	Description	Default
`code`	No
`depth`	No
`edges`	No
`index`	No
`items`	No
`limit`	No
`nodes`	No
`total`	No
`format`	No
`groups`	No
`module`	No
`offset`	No
`source`	No
`status`	Yes
`backend`	No
`message`	No
`sources`	No
`apk_path`	No
`coverage`	No
`has_more`	No
`input_id`	No
`dex_entry`	No
`direction`	No
`max_edges`	No
`max_nodes`	No
`span_unit`	No
`truncated`	No
`apk_sha256`	No
`class_name`	No
`edge_count`	No
`input_kind`	No
`limit_unit`	No
`node_count`	No
`session_id`	No
`source_end`	No
`superclass`	No
`total_unit`	No
`type_match`	No
`edge_counts`	No
`field_count`	No
`limitations`	No
`method_name`	No
`next_cursor`	No
`next_offset`	No
`query_cache`	No
`scan_errors`	No
`access_flags`	No
`has_manifest`	No
`method_count`	No
`source_start`	No
`stored_bytes`	No
`artifact_path`	No
`dynamic_sites`	No
`source_sha256`	No
`type_relation`	No
`engine_version`	No
`returned_sites`	No
`artifact_sha256`	No
`backend_version`	No
`candidate_count`	No
`cleanup_pending`	No
`page_limited_by`	No
`scanned_methods`	No
`type_descriptor`	No
`definition_count`	No
`field_descriptor`	No
`idle_ttl_seconds`	No
`reference_format`	No
`selected_modules`	No
`unresolved_sites`	No
`member_references`	No
`method_descriptor`	No
`truncation_reasons`	No
`unresolved_matches`	No
`reference_semantics`	No
`response_byte_limit`	No
`methods_without_code`	No
`reserved_index_bytes`	No
`runtime_completeness`	No
`scanned_instructions`	No
`hierarchy_cycle_detected`	No
`instruction_scan_complete`	No
`runtime_target_resolution`	No
`unresolved_sites_truncated`	No
`traversal_complete_within_depth`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed23 schema fields changedv0.2.5Oct 29, 2026

addedOutput schema / $defs / DexRow / properties / target_index

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

addedOutput schema / $defs / ReferenceGroup

Added value: +{
+  "additionalProperties": true,
+  "properties": {
+    "caller": {
+      "title": "Caller",
+      "type": "string"
+    },
+    "dex_entry": {
+      "title": "Dex Entry",
+      "type": "string"
+    },
+    "evidence": {
+      "items": {
+        "$ref": "#/$defs/DexRow"
+      },
+      "title": "Evidence",
+      "type": "array"
+    },
+    "matches": {
+      "items": {
+        "type": "string"
+      },
+      "title": "Matches",
+      "type": "array"
+    },
+    "offset_unit": {
+      "title": "Offset Unit",
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "target_field": {
+      "enum": [
+        "callee",
+        "field_descriptor",
+        "value",
+        "type_descriptor"
+      ],
+      "title": "Target Field",
+      "type": "string"
+    }
+  },
+  "required": [
+    "dex_entry",
+    "caller",
+    "target_field",
+    "matches",
+    "evidence"
+  ],
+  "title": "ReferenceGroup",
+  "type": "object"
+}

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 / groups

Added value: +{
+  "items": {
+    "$ref": "#/$defs/ReferenceGroup"
+  },
+  "title": "Groups",
+  "type": "array"
+}

addedOutput schema / properties / limit_unit

Added value: +{
+  "const": "caller_groups",
+  "title": "Limit Unit",
+  "type": "string"
+}

addedOutput schema / properties / module

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

addedOutput schema / properties / next_cursor

Added value: +{
+  "title": "Next Cursor",
+  "type": [
+    "string",
+    "null"
+  ]
+}

removedOutput schema / properties / page_limited_by / const
```
Removed value: -"response_bytes"
```

addedOutput schema / properties / page_limited_by / enum

Added value: +[
+  "response_bytes",
+  "caller_groups"
+]

addedOutput schema / properties / reference_format

Added value: +{
+  "const": "grouped",
+  "title": "Reference Format",
+  "type": "string"
+}

addedOutput schema / properties / returned_sites

Added value: +{
+  "title": "Returned Sites",
+  "type": "integer"
+}

addedOutput schema / properties / selected_modules

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

addedOutput schema / properties / total_unit

Added value: +{
+  "const": "reference_sites",
+  "title": "Total Unit",
+  "type": "string"
+}

addedOutput schema / properties / type_match

Added value: +{
+  "enum": [
+    "exact",
+    "substring"
+  ],
+  "title": "Type Match",
+  "type": "string"
+}

addedOutput schema / properties / type_relation

Added value: +{
+  "title": "Type Relation",
+  "type": "string"
+}

Changed18 schema fields changedv0.2.4Oct 27, 2026

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 / $defs / GraphNode / properties / dex_entry / anyOf

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

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

removedOutput schema / $defs / GraphNode / properties / without_code / anyOf

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

addedOutput schema / $defs / GraphNode / properties / without_code / type
```
Added value: +[
+  "boolean",
+  "null"
+]
```

addedOutput schema / $defs / QueryCache / properties / budget_bytes

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

addedOutput schema / $defs / QueryCache / properties / stored_bytes

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

removedOutput schema / properties / next_offset / anyOf

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

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

addedOutput schema / properties / page_limited_by

Added value: +{
+  "const": "response_bytes",
+  "title": "Page Limited By",
+  "type": "string"
+}

addedOutput schema / properties / response_byte_limit

Added value: +{
+  "title": "Response Byte Limit",
+  "type": "integer"
+}

removedOutput schema / properties / superclass / anyOf

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

addedOutput schema / properties / superclass / type
```
Added value: +[
+  "string",
+  "null"
+]
```

Addedv0.2.3Oct 23, 2026

TDQS

A4.4/5.0

Behavior5/5

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

Annotations only cover the safety profile (non-read-only, non-destructive, closed-world), and the description adds real behavioral facts beyond them: the session is a validated snapshot, not a resident engine, it is hash-bound and immutable, idle sessions expire, capacity eviction is possible, and invalidation requires a new session. These are exactly the lifecycle facts an agent needs to avoid stale-handle failures.

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?

Three short sentences, front-loaded with the action and result, followed by the reuse model and invalidations. No filler; each sentence carries a distinct fact.

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 an output schema present, the description needn't explain return values, and it covers the parts an agent would otherwise get wrong (expiry, eviction, invalidation). A small gap is that it never points to the related lifecycle siblings asc_query_dex_session / asc_close_dex_session, leaving the follow-up path implicit.

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% and the single dex_paths parameter is already documented (ordered, max 64, server-bounded byte total). The description adds only implicit meaning, that ordering matters because the session is hash-bound; it contributes no format or precedence detail beyond the schema.

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?

Specific verb plus resource plus result: 'Validate and snapshot DEX inputs once; return an immutable hash-bound session.' The DEX-inputs scope cleanly distinguishes it from the artifact-oriented sibling asc_open_artifact_session, and the returned handle (a session) is named.

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

Usage Guidelines4/5

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

'Source file changes require opening a new session' gives an explicit trigger condition for calling this tool, and the first sentence implies call-once-then-reuse. What's missing is an explicit alternative (e.g. asc_open_artifact_session for non-DEX artifacts) or a pointer that this is a prerequisite for asc_query_dex_session.

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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