workspace-closeClose the selected C# workspace to end your session and release its resources. Identify the target by workspaceId, alias, or absolute path.
Closes the selected workspace.
| Name | Required | Description | Default |
|---|---|---|---|
| workspace | No | Provide workspaceId, alias, path, or any combination. |
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Changes observed during successful MCP inspections.
v1.0.4Output schema / (root)Previous value: -nullNew value: +{
+ "$defs": {
+ "warningInfo": {
+ "properties": {
+ "code": {
+ "description": "The stable machine-readable warning code.",
+ "type": "string"
+ },
+ "message": {
+ "description": "The human-readable warning message.",
+ "type": "string"
+ }
+ },
+ "required": [
+ "code",
+ "message"
+ ],
+ "type": "object"
+ }
+ },
+ "oneOf": [
+ {
+ "properties": {
+ "data": {
+ "description": "Tool-specific result payload.",
+ "properties": {
+ "closedPath": {
+ "description": "The path that was closed.",
+ "type": "string"
+ }
+ },
+ "required": [
+ "closedPath"
+ ],
+ "type": [
+ "object",
+ "null"
+ ]
+ },
+ "ok": {
+ "const": true,
+ "description": "Whether the tool invocation succeeded."
+ },
+ "snapshot": {
+ "description": "Exact immutable workspace snapshot associated with the result, when available.",
+ "properties": {
+ "snapshotId": {
+ "format": "uuid",
+ "type": "string"
+ },
+ "transactionRevision": {
+ "type": [
+ "integer",
+ "null"
+ ]
+ },
+ "workspaceEpoch": {
+ "type": "integer"
+ },
+ "workspaceId": {
+ "format": "uuid",
+ "type": "string"
+ }
+ },
+ "required": [
+ "workspaceId",
+ "workspaceEpoch",
+ "snapshotId",
+ "transactionRevision"
+ ],
+ "type": "object"
+ },
+ "warnings": {
+ "description": "Non-fatal warnings the agent should consider.",
+ "items": {
+ "$ref": "#/$defs/warningInfo"
+ },
+ "type": "array"
+ }
+ },
+ "required": [
+ "ok",
+ "data"
+ ],
+ "type": "object"
+ },
+ {
+ "properties": {
+ "continuation": {
+ "description": "Action the agent should take before retrying or continuing.",
+ "oneOf": [
+ {
+ "additionalProperties": false,
+ "properties": {
+ "instruction": {
+ "description": "Agent-facing instruction explaining how to continue.",
+ "minLength": 1,
+ "type": "string"
+ },
+ "kind": {
+ "const": "CallTool",
+ "description": "Action required before the original request can continue."
+ },
+ "tool": {
+ "description": "Tool to call before continuing the original request.",
+ "minLength": 1,
+ "type": "string"
+ }
+ },
+ "required": [
+ "kind",
+ "tool",
+ "instruction"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "instruction": {
+ "description": "Agent-facing instruction explaining how to continue.",
+ "minLength": 1,
+ "type": "string"
+ },
+ "kind": {
+ "const": "ChooseTool",
+ "description": "Action required before the original request can continue."
+ },
+ "tools": {
+ "description": "Allowed tool choices from which the agent must select one.",
+ "items": {
+ "description": "Name of a tool the agent may choose.",
+ "minLength": 1,
+ "type": "string"
+ },
+ "minItems": 1,
+ "type": "array",
+ "uniqueItems": true
+ }
+ },
+ "required": [
+ "kind",
+ "tools",
+ "instruction"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "instruction": {
+ "description": "Agent-facing instruction explaining how to continue.",
+ "minLength": 1,
+ "type": "string"
+ },
+ "kind": {
+ "const": "RetryRequest",
+ "description": "Action required before the original request can continue."
+ }
+ },
+ "required": [
+ "kind",
+ "instruction"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "instruction": {
+ "description": "Agent-facing instruction explaining how to continue.",
+ "minLength": 1,
+ "type": "string"
+ },
+ "kind": {
+ "const": "ReviseRequest",
+ "description": "Action required before the original request can continue."
+ }
+ },
+ "required": [
+ "kind",
+ "instruction"
+ ],
+ "type": "object"
+ },
+ {
+ "additionalProperties": false,
+ "properties": {
+ "instruction": {
+ "description": "Agent-facing instruction explaining how to continue.",
+ "minLength": 1,
+ "type": "string"
+ },
+ "kind": {
+ "const": "ResolveExternally",
+ "description": "Action required before the original request can continue."
+ }
+ },
+ "required": [
+ "kind",
+ "instruction"
+ ],
+ "type": "object"
+ }
+ ]
+ },
+ "diagnostics": {
+ "description": "Diagnostics that explain the failed invocation.",
+ "items": {
+ "properties": {
+ "id": {
+ "description": "The diagnostic identifier.",
+ "type": "string"
+ },
+ "location": {
+ "description": "The optional source location of the diagnostic.",
+ "properties": {
+ "column": {
+ "description": "The one-based column number.",
+ "type": "integer"
+ },
+ "document": {
+ "description": "The resolved document.",
+ "properties": {
+ "documentId": {
+ "description": "The document identifier.",
+ "type": "string"
+ },
+ "path": {
+ "description": "The normalized document path.",
+ "type": "string"
+ },
+ "projectId": {
+ "description": "The owning project identifier.",
+ "type": "string"
+ }
+ },
+ "required": [
+ "documentId",
+ "path",
+ "projectId"
+ ],
+ "type": [
+ "object",
+ "null"
+ ]
+ },
+ "line": {
+ "description": "The one-based line number.",
+ "type": "integer"
+ },
+ "selector": {
+ "description": "The canonical selector that can resolve this source location again.",
+ "properties": {
+ "span": {
+ "properties": {
+ "document": {
+ "description": "Provide exactly one of path or documentId.",
+ "properties": {
+ "documentId": {
+ "description": "Workspace-local document ID.",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "path": {
+ "description": "Workspace-relative path.",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "project": {
+ "description": "Disambiguates documents with matching paths or IDs.",
+ "properties": {
+ "name": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "path": {
+ "description": "Workspace-relative path.",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "projectId": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "targetFramework": {
+ "type": [
+ "string",
+ "null"
+ ]
+ }
+ },
+ "type": [
+ "object",
+ "null"
+ ]
+ }
+ },
+ "type": "object"
+ },
+ "range": {
+ "description": "Zero-based UTF-16 range.",
+ "properties": {
+ "length": {
+ "description": "UTF-16 code-unit length.",
+ "maximum": 2147483647,
+ "minimum": 0,
+ "type": "integer"
+ },
+ "start": {
+ "description": "Zero-based UTF-16 offset.",
+ "maximum": 2147483647,
+ "minimum": 0,
+ "type": "integer"
+ }
+ },
+ "type": "object"
+ }
+ },
+ "required": [
+ "document",
+ "range"
+ ],
+ "type": "object"
+ }
+ },
+ "required": [
+ "span"
+ ],
+ "type": [
+ "object",
+ "null"
+ ]
+ },
+ "snapshot": {
+ "description": "The exact immutable workspace snapshot associated with this location.",
+ "properties": {
+ "snapshotId": {
+ "format": "uuid",
+ "type": "string"
+ },
+ "transactionRevision": {
+ "type": [
+ "integer",
+ "null"
+ ]
+ },
+ "workspaceEpoch": {
+ "type": "integer"
+ },
+ "workspaceId": {
+ "format": "uuid",
+ "type": "string"
+ }
+ },
+ "required": [
+ "workspaceId",
+ "workspaceEpoch",
+ "snapshotId",
+ "transactionRevision"
+ ],
+ "type": "object"
+ },
+ "span": {
+ "description": "The resolved text span.",
+ "properties": {
+ "length": {
+ "description": "UTF-16 code-unit length.",
+ "maximum": 2147483647,
+ "minimum": 0,
+ "type": "integer"
+ },
+ "start": {
+ "description": "Zero-based UTF-16 offset.",
+ "maximum": 2147483647,
+ "minimum": 0,
+ "type": "integer"
+ }
+ },
+ "type": [
+ "object",
+ "null"
+ ]
+ }
+ },
+ "required": [
+ "snapshot"
+ ],
+ "type": [
+ "object",
+ "null"
+ ]
+ },
+ "message": {
+ "description": "The diagnostic message.",
+ "type": "string"
+ },
+ "severity": {
+ "description": "The diagnostic severity.",
+ "enum": [
+ "Hidden",
+ "Info",
+ "Warning",
+ "Error"
+ ],
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "message"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "error": {
+ "description": "Structured error details when the invocation failed.",
+ "properties": {
+ "code": {
+ "description": "Stable machine-readable error code.",
+ "type": "string"
+ },
+ "correlationId": {
+ "description": "Correlation identifier for matching the failure to server-side diagnostics, when available.",
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "message": {
+ "description": "Human-readable explanation of the failure.",
+ "type": "string"
+ }
+ },
+ "required": [
+ "code",
+ "message"
+ ],
+ "type": "object"
+ },
+ "ok": {
+ "const": false,
+ "description": "Whether the tool invocation succeeded."
+ },
+ "warnings": {
+ "description": "Non-fatal warnings the agent should consider.",
+ "items": {
+ "$ref": "#/$defs/warningInfo"
+ },
+ "type": "array"
+ }
+ },
+ "required": [
+ "ok",
+ "error"
+ ],
+ "type": "object"
+ },
+ {
+ "properties": {
+ "diagnostics": {
+ "description": "Diagnostics that explain the failed invocation.",
+ "properties": {
+ "detailsAvailable": {
+ "const": true
+ },
+ "detailsTool": {
+ "const": "get-error-details"
+ }
+ },
+ "required": [
+ "detailsAvailable",
+ "detailsTool"
+ ],
+ "type": "object"
+ },
+ "error": {
+ "description": "Structured error details when the invocation failed.",
+ "properties": {
+ "code": {
+ "const": "UnhandledException"
+ },
+ "correlationId": {
+ "format": "uuid",
+ "type": "string"
+ },
+ "message": {
+ "const": "Tool execution failed."
+ }
+ },
+ "required": [
+ "code",
+ "message",
+ "correlationId"
+ ],
+ "type": "object"
+ },
+ "ok": {
+ "const": false,
+ "description": "Whether the tool invocation succeeded."
+ },
+ "reporting": {
+ "description": "Error-reporting workflow available for an unhandled failure.",
+ "properties": {
+ "canPrepare": {
+ "type": "boolean"
+ },
+ "prepareTool": {
+ "type": [
+ "string",
+ "null"
+ ]
+ },
+ "state": {
+ "enum": [
+ "Available",
+ "AlwaysApproved",
+ "DisabledByConfiguration",
+ "ApprovalUnavailable"
+ ],
+ "type": "string"
+ }
+ },
+ "required": [
+ "state"
+ ],
+ "type": "object"
+ }
+ },
+ "required": [
+ "ok",
+ "error",
+ "diagnostics"
+ ],
+ "type": "object"
+ }
+ ],
+ "type": "object"
+}v1.0.2Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations indicate this is a non-read-only, non-destructive, non-idempotent mutation. The description does not add context about what 'closing' does to state, whether unsaved changes are affected, or whether the operation can be undone. With annotations present, a 3 reflects the baseline behavior noted by structured data but adds little value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single, clear sentence that is front-loaded and free of filler. It conveys the core action without unnecessary elaboration.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool takes one optional workspace parameter, has an output schema, and carries annotations, the description is minimally adequate but lacks behavioral context like consequences of closing, expected side effects, or error conditions, which would help an agent invoke it correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so parameter documentation is fully handled by the schema, including the workspace object with path, alias, and workspaceId. The description adds no parameter-level detail beyond what is already in the schema, making a 3 a fair baseline.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (Closes) and resource (the selected workspace), which is clear enough. However, it does not distinguish itself from the related sibling workspace-reload or explain what 'selected' means in the context of the workspace parameter.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus workspace-reload, workspace-open, or workspace-list. There is no mention of prerequisites or context needed before closing a workspace.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.