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Polarion MCP Server

Polarion MCP Server

by phillipboesger
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

getWorkItemAttachment

Read-only

Retrieve the specified Work Item attachment by project, work item, and attachment ID. Use it to fetch one attachment's details without listing the full collection.

Instructions

Returns the specified Work Item Attachment. Cardinality: targets a single item by ID. For the full collection or a batch, use getWorkItemAttachments instead.

Input Schema

NameRequiredDescriptionDefault
fieldsNoSparse fieldset selector: an object keyed by resource type (e.g. `workitems`) whose value is a comma-separated list of attribute names to return (e.g. `id,title,status`), reducing payload size. Omit to return the default field set.
includeNoComma-separated list of related resource types to embed in the response (e.g. `author,attachments`) so they don't require a separate follow-up call. Omit to return only the primary resource.
revisionNoA specific repository revision (e.g. `1234`) to read the resource as it existed at that revision instead of the current HEAD. Omit to use the latest revision.
projectIdYesThe Polarion project ID (its URL segment, e.g. `myproject`), case-sensitive. Required to scope the request to one project. If the ID is unknown, ask the user; getProjects lists IDs only with global read access.
workItemIdYesThe Work Item's ID within its project (e.g. `WI-123`), not the combined `project/id` path used in some link payloads.
attachmentIdYesThe attachment's ID, as returned by the corresponding list- or get-attachments call for this resource.
response_formatNoResponse detail level. concise removes redundant HTML and JSON:API metadata and may use a small default fieldset on large lists; detailed preserves the complete response. Defaults to detailed.detailed

Output Schema

NameRequiredDescriptionDefault
dataNo
linksNo
includedNoRelated entities might be returned, see <a href="https://docs.sw.siemens.com/en-US/doc/230235217/PL20250606201928474.polarion_help_sc.xid2134849/xid2134871" target="_blank">REST API User Guide</a>.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changedv1.4.4
    • changedInput schema / properties / projectId / description
      Previous value: -"The Polarion project ID (its URL segment, e.g. `myproject`), case-sensitive. Required to scope the request to one project; call getProjects to list valid IDs."New value: +"The Polarion project ID (its URL segment, e.g. `myproject`), case-sensitive. Required to scope the request to one project. If the ID is unknown, ask the user; getProjects lists IDs only with global read access."
  2. Changed1 schema field changedv1.4.0
    • addedInput schema / properties / response_format
      Added value: +{
+  "default": "detailed",
+  "description": "Response detail level. concise removes redundant HTML and JSON:API metadata and may use a small default fieldset on large lists; detailed preserves the complete response. Defaults to detailed.",
+  "enum": [
+    "concise",
+    "detailed"
+  ],
+  "type": "string"
+}
  3. Changed65 schema fields changedv1.3.1
    • removedOutput schema / properties / data / properties / attributes / properties / fileName / example
      Removed value: -"File Name"
    • changedOutput schema / properties / data / properties / attributes / properties / fileName / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / attributes / properties / id / example
      Removed value: -"MyAttachmentId"
    • changedOutput schema / properties / data / properties / attributes / properties / id / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / attributes / properties / length / format
      Removed value: -"int32"
    • changedOutput schema / properties / data / properties / attributes / properties / length / type
      Previous value: -"integer"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / attributes / properties / title / example
      Removed value: -"Title"
    • changedOutput schema / properties / data / properties / attributes / properties / title / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / attributes / properties / updated / example
      Removed value: -"1970-01-01T00:00:00Z"
    • removedOutput schema / properties / data / properties / attributes / properties / updated / format
      Removed value: -"date-time"
    • changedOutput schema / properties / data / properties / attributes / properties / updated / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / properties / attributes / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • removedOutput schema / properties / data / properties / id / example
      Removed value: -"MyProjectId/MyWorkItemId/MyAttachmentId"
    • changedOutput schema / properties / data / properties / id / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / links / properties / content / example
      Removed value: -"server-host-name/application-path/projects/MyProjectId/workitems/MyWorkItemId/attachments/MyAttachmentId/content?revision=1234"
    • changedOutput schema / properties / data / properties / links / properties / content / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / links / properties / self / example
      Removed value: -"server-host-name/application-path/projects/MyProjectId/workitems/MyWorkItemId/attachments/MyAttachmentId?revision=1234"
    • changedOutput schema / properties / data / properties / links / properties / self / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / properties / links / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • removedOutput schema / properties / data / properties / meta / properties / errors / items / properties / detail / example
      Removed value: -"Unexpected token, BEGIN_ARRAY expected, but was : BEGIN_OBJECT (at $.data)"
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / detail / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / parameter / example
      Removed value: -"revision"
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / parameter / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / pointer / example
      Removed value: -"$.data"
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / pointer / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / resource / properties / id / example
      Removed value: -"MyProjectId/id"
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / resource / properties / id / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / resource / properties / type / example
      Removed value: -"type"
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / resource / properties / type / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / properties / resource / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / source / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • removedOutput schema / properties / data / properties / meta / properties / errors / items / properties / status / example
      Removed value: -"400"
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / status / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / meta / properties / errors / items / properties / title / example
      Removed value: -"Bad Request"
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / properties / title / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / properties / meta / properties / errors / items / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / data / properties / meta / properties / errors / type
      Previous value: -"array"New value: +[
+  "array",
+  "null"
+]
    • changedOutput schema / properties / data / properties / meta / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • removedOutput schema / properties / data / properties / relationships / properties / author / properties / data / properties / id / example
      Removed value: -"MyUserId"
    • changedOutput schema / properties / data / properties / relationships / properties / author / properties / data / properties / id / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / relationships / properties / author / properties / data / properties / revision / example
      Removed value: -"1234"
    • changedOutput schema / properties / data / properties / relationships / properties / author / properties / data / properties / revision / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / relationships / properties / author / properties / data / properties / type / enum
      Removed value: -[
-  "users"
-]
    • changedOutput schema / properties / data / properties / relationships / properties / author / properties / data / properties / type / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / properties / relationships / properties / author / properties / data / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / data / properties / relationships / properties / author / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • removedOutput schema / properties / data / properties / relationships / properties / project / properties / data / properties / id / example
      Removed value: -"MyProjectId"
    • changedOutput schema / properties / data / properties / relationships / properties / project / properties / data / properties / id / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / relationships / properties / project / properties / data / properties / revision / example
      Removed value: -"1234"
    • changedOutput schema / properties / data / properties / relationships / properties / project / properties / data / properties / revision / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / relationships / properties / project / properties / data / properties / type / enum
      Removed value: -[
-  "projects"
-]
    • changedOutput schema / properties / data / properties / relationships / properties / project / properties / data / properties / type / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / properties / relationships / properties / project / properties / data / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / data / properties / relationships / properties / project / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / data / properties / relationships / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • removedOutput schema / properties / data / properties / revision / example
      Removed value: -"1234"
    • changedOutput schema / properties / data / properties / revision / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / properties / type / enum
      Removed value: -[
-  "workitem_attachments"
-]
    • changedOutput schema / properties / data / properties / type / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / included / items / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / included / type
      Previous value: -"array"New value: +[
+  "array",
+  "null"
+]
    • removedOutput schema / properties / links / properties / self / example
      Removed value: -"server-host-name/application-path/projects/MyProjectId/workitems/MyWorkItemId/attachments/MyAttachmentId?revision=1234"
    • changedOutput schema / properties / links / properties / self / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / links / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
  4. Changed6 schema fields changedv1.2.0
    • changedInput schema / properties / attachmentId / description
      Previous value: -"The Attachment ID."New value: +"The attachment's ID, as returned by the corresponding list- or get-attachments call for this resource."
    • changedInput schema / properties / fields / description
      Previous value: -"Filter returned resource fields. See <a href=\"https://docs.sw.siemens.com/en-US/doc/230235217/PL20250606201928474.polarion_help_sc.xid2134849/xid2134871\" target=\"_blank\">REST API User Guide</a> for details."New value: +"Sparse fieldset selector: an object keyed by resource type (e.g. `workitems`) whose value is a comma-separated list of attribute names to return (e.g. `id,title,status`), reducing payload size. Omit to return the default field set."
    • changedInput schema / properties / include / description
      Previous value: -"Include related entities. See <a href=\"https://docs.sw.siemens.com/en-US/doc/230235217/PL20250606201928474.polarion_help_sc.xid2134849/xid2134871\" target=\"_blank\">REST API User Guide</a> for details."New value: +"Comma-separated list of related resource types to embed in the response (e.g. `author,attachments`) so they don't require a separate follow-up call. Omit to return only the primary resource."
    • changedInput schema / properties / projectId / description
      Previous value: -"The Project ID."New value: +"The Polarion project ID (its URL segment, e.g. `myproject`), case-sensitive. Required to scope the request to one project; call getProjects to list valid IDs."
    • changedInput schema / properties / revision / description
      Previous value: -"The revision ID."New value: +"A specific repository revision (e.g. `1234`) to read the resource as it existed at that revision instead of the current HEAD. Omit to use the latest revision."
    • changedInput schema / properties / workItemId / description
      Previous value: -"The Work Item ID."New value: +"The Work Item's ID within its project (e.g. `WI-123`), not the combined `project/id` path used in some link payloads."
  5. Changed1 schema field changedv1.1.0
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "properties": {
+    "data": {
+      "properties": {
+        "attributes": {
+          "properties": {
+            "fileName": {
+              "example": "File Name",
+              "type": "string"
+            },
+            "id": {
+              "example": "MyAttachmentId",
+              "type": "string"
+            },
+            "length": {
+              "format": "int32",
+              "type": "integer"
+            },
+            "title": {
+              "example": "Title",
+              "type": "string"
+            },
+            "updated": {
+              "example": "1970-01-01T00:00:00Z",
+              "format": "date-time",
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "id": {
+          "example": "MyProjectId/MyWorkItemId/MyAttachmentId",
+          "type": "string"
+        },
+        "links": {
+          "properties": {
+            "content": {
+              "example": "server-host-name/application-path/projects/MyProjectId/workitems/MyWorkItemId/attachments/MyAttachmentId/content?revision=1234",
+              "type": "string"
+            },
+            "self": {
+              "example": "server-host-name/application-path/projects/MyProjectId/workitems/MyWorkItemId/attachments/MyAttachmentId?revision=1234",
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "meta": {
+          "properties": {
+            "errors": {
+              "items": {
+                "properties": {
+                  "detail": {
+                    "description": "Human-readable explanation specific to this occurrence of the problem.",
+                    "example": "Unexpected token, BEGIN_ARRAY expected, but was : BEGIN_OBJECT (at $.data)",
+                    "type": "string"
+                  },
+                  "source": {
+                    "properties": {
+                      "parameter": {
+                        "description": "String indicating which URI query parameter caused the error.",
+                        "example": "revision",
+                        "type": "string"
+                      },
+                      "pointer": {
+                        "description": "JSON Pointer to the associated entity in the request document.",
+                        "example": "$.data",
+                        "type": "string"
+                      },
+                      "resource": {
+                        "description": "Resource causing the error.",
+                        "properties": {
+                          "id": {
+                            "example": "MyProjectId/id",
+                            "type": "string"
+                          },
+                          "type": {
+                            "example": "type",
+                            "type": "string"
+                          }
+                        },
+                        "type": "object"
+                      }
+                    },
+                    "type": "object"
+                  },
+                  "status": {
+                    "description": "HTTP status code applicable to this problem.",
+                    "example": "400",
+                    "type": "string"
+                  },
+                  "title": {
+                    "description": "Short, human-readable summary of the problem.",
+                    "example": "Bad Request",
+                    "type": "string"
+                  }
+                },
+                "type": "object"
+              },
+              "type": "array"
+            }
+          },
+          "type": "object"
+        },
+        "relationships": {
+          "properties": {
+            "author": {
+              "properties": {
+                "data": {
+                  "properties": {
+                    "id": {
+                      "example": "MyUserId",
+                      "type": "string"
+                    },
+                    "revision": {
+                      "example": "1234",
+                      "type": "string"
+                    },
+                    "type": {
+                      "enum": [
+                        "users"
+                      ],
+                      "type": "string"
+                    }
+                  },
+                  "type": "object"
+                }
+              },
+              "type": "object"
+            },
+            "project": {
+              "properties": {
+                "data": {
+                  "properties": {
+                    "id": {
+                      "example": "MyProjectId",
+                      "type": "string"
+                    },
+                    "revision": {
+                      "example": "1234",
+                      "type": "string"
+                    },
+                    "type": {
+                      "enum": [
+                        "projects"
+                      ],
+                      "type": "string"
+                    }
+                  },
+                  "type": "object"
+                }
+              },
+              "type": "object"
+            }
+          },
+          "type": "object"
+        },
+        "revision": {
+          "example": "1234",
+          "type": "string"
+        },
+        "type": {
+          "enum": [
+            "workitem_attachments"
+          ],
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
+    "included": {
+      "description": "Related entities might be returned, see <a href=\"https://docs.sw.siemens.com/en-US/doc/230235217/PL20250606201928474.polarion_help_sc.xid2134849/xid2134871\" target=\"_blank\">REST API User Guide</a>.",
+      "items": {
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "links": {
+      "properties": {
+        "self": {
+          "example": "server-host-name/application-path/projects/MyProjectId/workitems/MyWorkItemId/attachments/MyAttachmentId?revision=1234",
+          "type": "string"
+        }
+      },
+      "type": "object"
+    }
+  },
+  "type": "object"
+}
  6. Changed2 schema fields changed
    • changedInput schema / properties / fields / description
      Previous value: -"Filter returned resource fields. See <a href=\"https://docs.sw.siemens.com/en-US/doc/230235217/PL20231017526942799.polarion_help_sc.xid2134849/xid2134871\" target=\"_blank\">REST API User Guide</a> for details."New value: +"Filter returned resource fields. See <a href=\"https://docs.sw.siemens.com/en-US/doc/230235217/PL20250606201928474.polarion_help_sc.xid2134849/xid2134871\" target=\"_blank\">REST API User Guide</a> for details."
    • changedInput schema / properties / include / description
      Previous value: -"Include related entities. See <a href=\"https://docs.sw.siemens.com/en-US/doc/230235217/PL20231017526942799.polarion_help_sc.xid2134849/xid2134871\" target=\"_blank\">REST API User Guide</a> for details."New value: +"Include related entities. See <a href=\"https://docs.sw.siemens.com/en-US/doc/230235217/PL20250606201928474.polarion_help_sc.xid2134849/xid2134871\" target=\"_blank\">REST API User Guide</a> for details."
  7. First observedv1.0.0

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 and openWorldHint=true, so the safety profile is covered. The description adds the single-item targeting constraint but says nothing about payload size, whether binary content is included, or error behavior when the attachment is absent — modest added value against a low bar.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three tight sentences with the core action front-loaded and the disambiguation second. Slightly terse for a tool that shares a near-identical name with two siblings, but no wasted text.

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?

An output schema exists so return values need no explanation, and the seven parameters are fully documented in-schema. The remaining gap is conceptual: the description never clarifies the metadata-vs-content boundary against getWorkItemAttachmentContent and patchWorkItemAttachment in the same family.

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%, with fields, include, revision, response_format and the three required IDs all documented in-schema. The description contributes no additional parameter semantics, so the baseline 3 applies.

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 and resource ('Returns the specified Work Item Attachment') and adds a cardinality note that separates it from the plural collection tool. However it never distinguishes itself from the closely-named sibling getWorkItemAttachmentContent, so an agent cannot tell from the description whether this yields metadata or the binary file.

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?

Explicitly names the alternative for the batch case ('use `getWorkItemAttachments` instead'), which is exactly the kind of routing guidance that helps selection. It omits the equally important exclusion against getWorkItemAttachmentContent, so usage is only partly disambiguated.

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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