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Polarion MCP Server

Polarion MCP Server

by phillipboesger
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

getTestRunAttachmentContent

Read-only

Downloads a Test Run attachment as image, text, or embedded base64 resource content, refusing files over 20 MB. Use it when you need the actual attachment bytes, not metadata or a list.

Instructions

Downloads one Test Run attachment and returns its file bytes as image, text, or embedded-resource content. 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 getTestRunAttachment for metadata or getTestRunAttachments to list available attachment IDs; read the attachment only when its contents are needed.

Input Schema

NameRequiredDescriptionDefault
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.
testRunIdYesThe Test Run's ID within its project.
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

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 / testRunId / description
      Previous value: -"The Test Run ID."New value: +"The Test Run's ID within its project."
  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?

Beyond the readOnlyHint annotation, it discloses the concrete return encoding per MIME type (image / text / embedded base64 resource), the 20 MB hard refusal threshold, and the UTF-8 text assumption. These are behavioral traits an agent cannot infer from the annotations or schema.

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 and return behavior, then the size limit, then the sibling routing. No redundant restatement of the name and nothing that could be cut without losing information.

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?

With no output schema, the description carries the return-shape burden and does so fully: the three content encodings and the size ceiling are exactly what an agent needs to handle the response. Nothing material is missing for correct invocation.

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 the schema already documents projectId, testRunId, attachmentId, revision, and response_format. The description adds the provenance hint that attachmentId comes from a list call, but says nothing about the revision or response_format parameters, so baseline 3 applies.

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?

States a specific verb+resource (downloads one Test Run attachment, returns file bytes) and immediately scopes it against the sibling read tools getTestRunAttachment and getTestRunAttachments. An agent can distinguish this from the metadata/list siblings without opening any schema.

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?

Explicit routing: use getTestRunAttachment for metadata, getTestRunAttachments to list IDs, and read content 'only when its contents are needed.' This is an explicit when-to-use plus named alternatives, not an implied one.

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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