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Polarion MCP Server

Polarion MCP Server

by phillipboesger
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

getDocumentAttachmentContent

Read-only

Download the raw bytes of a Polarion document attachment, returning images as image content, UTF-8 text as text, and other files as base64 resources; use it when you need file content, not metadata.

Instructions

Downloads the raw file content of one Document attachment. Images (PNG, JPEG, GIF, WebP) come back as image content, UTF-8 text files as text, and any other file (PDF, Office, ZIP) as an embedded base64 resource; files over 20 MB are refused. Use this only when you need the file's bytes; for its metadata (fileName, contentType, size, author) call getDocumentAttachment, and to discover attachment IDs call getDocumentAttachments.

Input Schema

NameRequiredDescriptionDefault
spaceIdYesThe Document Space ID (a folder-like grouping of documents/pages within a project). Use `_default` (no quotes) to address the project's default space.
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.
attachmentIdYesThe attachment's ID, as returned by the corresponding list- or get-attachments call for this resource.
documentNameYesThe Document name.
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

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. Changed4 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 / 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 / spaceId / description
      Previous value: -"The Space ID. (Use '_default' without quotes to address the default Space.)"New value: +"The Document Space ID (a folder-like grouping of documents/pages within a project). Use `_default` (no quotes) to address the project's default space."
  4. First observedv1.0.0

TDQS

A4.7/5.0
Behavior5/5

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

Annotations only declare readOnlyHint and openWorldHint; the description adds the substantive behavior: content shape per MIME type (image content, UTF-8 text, base64 embedded resource for PDF/Office/ZIP) and a hard 20 MB refusal limit. This is exactly the extra context an agent needs beyond the safety profile.

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 sentences, front-loaded with the action, then the return-shape matrix and limits, then the routing guidance. Every sentence carries distinct information with no repetition of the name or annotations.

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

Completeness5/5

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

No output schema exists, and the description compensates by describing the actual return payload forms and the 20 MB failure condition. Together with the fully documented input schema, an agent has everything needed to call and interpret this tool.

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 including the `revision` and `response_format` semantics are already documented in the schema. The description implies `attachmentId` comes from the sibling list call but adds no syntax or format detail beyond what the schema provides — correct baseline for a fully documented 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?

The description opens with a specific verb+resource ('Downloads the raw file content of one Document attachment') and immediately distinguishes itself from the metadata sibling `getDocumentAttachment` and the discovery sibling `getDocumentAttachments`. An agent can tell exactly what this tool returns versus its neighbors.

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

Usage Guidelines5/5

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

It states the selection condition explicitly ('Use this only when you need the file's bytes'), names two alternatives and the cases that route to them (metadata: fileName/contentType/size/author; IDs: list attachments). Nothing is left to inference.

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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