Argus

by chriswu727

Overview Schema Source Related Servers Discussions Admin

Python

Local

Restore Browser State Capsule

capsule_restore

Destructive

Restore a saved capsule and report its liveness status as LIVE or STALE from the marker without resetting backend data.

Instructions

Restore a saved capsule and report LIVE or STALE from its liveness marker. It does not reset backend data.

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": {
      "name": "<name>"
    },
    "name": "capsule_restore"
  }
}

Input Schema

Name	Required	Description	Default
`name`	Yes

Output Schema

Name	Required	Description	Default
`data`	No
`run_id`	Yes
`stages`	No
`status`	Yes
`recovery`	No
`operation`	Yes
`error_code`	Yes
`session_state`	Yes
`schema_version`	No
`progress_omitted`	No
`progress_delivery_failed`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedv0.10.0Oct 26, 2026
- removedInput schema / properties / name / title
```
Removed value: -"Name"
```
- removedInput schema / title
```
Removed value: -"capsule_restoreArguments"
```
Changed12 schema fields changedOct 26, 2026
- removedOutput schema / properties / data / title
```
Removed value: -"Data"
```
- removedOutput schema / properties / error_code / title
```
Removed value: -"Error Code"
```
- removedOutput schema / properties / operation / title
```
Removed value: -"Operation"
```
- removedOutput schema / properties / progress_delivery_failed / title
```
Removed value: -"Progress Delivery Failed"
```
- removedOutput schema / properties / progress_omitted / title
```
Removed value: -"Progress Omitted"
```
- removedOutput schema / properties / recovery / title
```
Removed value: -"Recovery"
```
- removedOutput schema / properties / run_id / title
```
Removed value: -"Run Id"
```
- removedOutput schema / properties / schema_version / title
```
Removed value: -"Schema Version"
```
- removedOutput schema / properties / session_state / title
```
Removed value: -"Session State"
```
- removedOutput schema / properties / stages / title
```
Removed value: -"Stages"
```
- removedOutput schema / properties / status / title
```
Removed value: -"Status"
```
- removedOutput schema / title
```
Removed value: -"AgentResult"
```

Changed14 schema fields changedv0.5.2Oct 26, 2026

addedOutput schema / properties / data

Added value: +{
+  "additionalProperties": true,
+  "title": "Data",
+  "type": "object"
+}

addedOutput schema / properties / error_code

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "title": "Error Code"
+}

addedOutput schema / properties / operation

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

addedOutput schema / properties / progress_delivery_failed

Added value: +{
+  "default": false,
+  "title": "Progress Delivery Failed",
+  "type": "boolean"
+}

addedOutput schema / properties / progress_omitted

Added value: +{
+  "default": 0,
+  "title": "Progress Omitted",
+  "type": "integer"
+}

addedOutput schema / properties / recovery

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

removedOutput schema / properties / result

Removed value: -{
-  "title": "Result",
-  "type": "string"
-}

addedOutput schema / properties / run_id

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "title": "Run Id"
+}

addedOutput schema / properties / schema_version

Added value: +{
+  "const": 1,
+  "default": 1,
+  "title": "Schema Version",
+  "type": "integer"
+}

addedOutput schema / properties / session_state

Added value: +{
+  "title": "Session State",
+  "type": "string"
+}

addedOutput schema / properties / stages

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

addedOutput schema / properties / status

Added value: +{
+  "enum": [
+    "completed",
+    "error"
+  ],
+  "title": "Status",
+  "type": "string"
+}

changedOutput schema / required

Previous value: -[
-  "result"
-]New value: +[
+  "operation",
+  "status",
+  "session_state",
+  "run_id",
+  "error_code"
+]

changedOutput schema / title

Previous value: -"capsule_restoreOutput"New value: +"AgentResult"

Addedv0.5.1Jul 21, 2026

TDQS

B3.3/5.0

Behavior3/5

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

Annotations already flag destructiveHint=true, non-idempotent, and open-world, and the description adds a scope clarification ('does not reset backend data') plus return semantics (LIVE/STALE). It still does not say what current browser state is overwritten by the restore, which is the key risk for a destructive operation, so this is additive but incomplete rather than contradictory.

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 tightly written sentences with the action and outcome front-loaded and the scope caveat placed second. No filler.

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 the LIVE/STALE return need not be documented in prose. However, for a destructive, non-idempotent restore the description omits what state is replaced and any precondition, leaving an agent without enough context to call it safely.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0% and the single required parameter 'name' has no schema description. The description never explains that 'name' identifies the capsule to restore, so it fails to compensate for the coverage gap.

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?

Specific verb ('Restore') plus specific resource ('a saved capsule'), and it states an outcome ('report LIVE or STALE from its liveness marker'). The inverse relationship to sibling capsule_save is inferable but never made explicit.

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 by the word 'saved', suggesting it applies to capsules created by capsule_save. There is no explicit when-to-use/when-not statement and no mention of prerequisites such as an active session.

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