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Polarion MCP Server

Polarion MCP Server

by phillipboesger
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

postGlobalCustomFields

Creates custom fields in the global Polarion context, spanning all projects. Use dry_run to validate the request and preview it before creating resources.

Instructions

Creates a list of Custom Fields in the Global context. Scope: spans every project (no project filter). To act on a single project, use postProjectCustomFields instead. Effect: creates a new resource. Repeating this call may create additional resources; it is not guaranteed idempotent. Tip: set dry_run: true first to validate the arguments and preview the exact request without sending it to Polarion. The executor returns this preview as normal text, and as structured content when the tool declares an output schema.

Input Schema

NameRequiredDescriptionDefault
dry_runNoIf true, validates the request and returns the exact request that would be sent to Polarion — with the Authorization header redacted and any binary payload summarized by byte length — without actually sending it.
requestBodyYesCustom Fields Body

Output Schema

NameRequiredDescriptionDefault
dataNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed9 schema fields changedv1.3.1
    • removedOutput schema / properties / data / items / properties / id / example
      Removed value: -"MyProjectId/workitems/epic"
    • changedOutput schema / properties / data / items / properties / id / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • removedOutput schema / properties / data / items / properties / links / properties / self / example
      Removed value: -"server-host-name/application-path/projects/MyProjectId/customfields/workitems/epic"
    • changedOutput schema / properties / data / items / properties / links / properties / self / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / items / properties / links / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • removedOutput schema / properties / data / items / properties / type / enum
      Removed value: -[
-  "customfields"
-]
    • changedOutput schema / properties / data / items / properties / type / type
      Previous value: -"string"New value: +[
+  "string",
+  "number",
+  "integer",
+  "boolean",
+  "null"
+]
    • changedOutput schema / properties / data / items / type
      Previous value: -"object"New value: +[
+  "object",
+  "null"
+]
    • changedOutput schema / properties / data / type
      Previous value: -"array"New value: +[
+  "array",
+  "null"
+]
  2. Changed1 schema field changedv1.2.0
    • changedInput schema / properties / dry_run / description
      Previous value: -"If true, validate and return the request that would be sent without calling Polarion."New value: +"If true, validates the request and returns the exact request that would be sent to Polarion — with the Authorization header redacted and any binary payload summarized by byte length — without actually sending it."
  3. Changed1 schema field changedv1.1.0
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
+  "properties": {
+    "data": {
+      "items": {
+        "properties": {
+          "id": {
+            "example": "MyProjectId/workitems/epic",
+            "type": "string"
+          },
+          "links": {
+            "properties": {
+              "self": {
+                "example": "server-host-name/application-path/projects/MyProjectId/customfields/workitems/epic",
+                "type": "string"
+              }
+            },
+            "type": "object"
+          },
+          "type": {
+            "enum": [
+              "customfields"
+            ],
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "type": "object"
+}
  4. Added

TDQS

A4.3/5.0
Behavior4/5

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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=false), and the description repeats the non-idempotency point rather than adding to it. What it does add is beyond the annotations: the dry-run preview workflow and the fact that the preview is returned both as plain text and as structured content. It still says nothing about permissions/auth scope for global writes, which would be the remaining high-value detail.

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?

Front-loaded with purpose, then scope, then effect, then tip — a sensible ordering. The idempotency sentence largely restates annotation data and could be dropped, but nothing else is wasted.

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?

Output schema exists so return values needn't be explained, and the description still usefully notes the preview appears as text and structured content. For a global-scope write with a deeply nested body, it is complete enough to invoke correctly; only auth/permission prerequisites are unaddressed.

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 nested requestBody shape and dry_run semantics are already documented structurally, making 3 the baseline. The description only adds behavioral framing for dry_run ('validate the arguments and preview the exact request') and contributes nothing about the field-level body contents beyond the 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?

States a specific verb and resource ('Creates a list of Custom Fields') plus the scope ('Global context', 'spans every project'), and explicitly names the sibling postProjectCustomFields as the project-scoped alternative. An agent can distinguish it from getGlobalCustomFields/postProjectCustomFields 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?

Gives an explicit routing rule ('To act on a single project, use `postProjectCustomFields` instead') and an operational recommendation to run with `dry_run: true` first. Both when-to-use and which-alternative are stated rather than inferred.

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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