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Polarion MCP Server

Polarion MCP Server

by phillipboesger
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TypeScript
Hybrid

deleteTestStepResultAttachment

DestructiveIdempotent

Deletes a single Test Step Result Attachment by ID, permanently removing it from a Polarion test run. Use dry_run first to validate arguments and preview the request before committing.

Instructions

Deletes the specified Test Step Result Attachment. Cardinality: targets a single item by ID. For the full collection or a batch, use deleteTestStepResultAttachments instead. Effect: irreversible — data removed or overwritten by this call cannot be recovered through the API. 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.
iterationYesThe iteration number identifying which repeated occurrence of this item is being addressed (e.g. which run of a test parameter).
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.
testCaseIdYesThe Test Case's ID being referenced.
attachmentIdYesThe attachment's ID, as returned by the corresponding list- or get-attachments call for this resource.
testStepIndexYesThe Test Step index.
testCaseProjectIdYesThe project ID that owns the referenced Test Case — may differ from the project in the request path when the test case is shared from another project.

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. Changed7 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 / 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."
    • changedInput schema / properties / iteration / description
      Previous value: -"The Iteration Number."New value: +"The iteration number identifying which repeated occurrence of this item is being addressed (e.g. which run of a test parameter)."
    • 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 / testCaseId / description
      Previous value: -"The Testcase ID."New value: +"The Test Case's ID being referenced."
    • changedInput schema / properties / testCaseProjectId / description
      Previous value: -"The Testcase Project ID."New value: +"The project ID that owns the referenced Test Case — may differ from the project in the request path when the test case is shared from another project."
    • changedInput schema / properties / testRunId / description
      Previous value: -"The Test Run ID."New value: +"The Test Run's ID within its project."
  3. Changed1 schema field changed
    • addedInput schema / properties / dry_run
      Added value: +{
+  "description": "If true, validate and return the request that would be sent without calling Polarion.",
+  "type": "boolean"
+}
  4. First observedv1.0.0

TDQS

A4.1/5.0
Behavior3/5

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

Annotations already declare destructiveHint=true, idempotentHint=true, readOnlyHint=false and openWorldHint=true, so the safety profile is covered structurally. The description adds the useful framing that the effect is irreversible and not recoverable through the API, plus the dry_run preview path and the note that the preview comes back as text (and structured content when an output schema exists). It does not cover failure modes such as a missing attachment ID or permission errors, so it earns a solid but not full score.

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 cardinality, alternative, and effect — good ordering with no wasted preamble. The final sentence about the executor returning structured content when the tool declares an output schema is conditional boilerplate that does not apply here (no output schema) and mildly pads an otherwise tight description.

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?

For a destructive, seven-required-parameter delete with no output schema, the definition covers what matters most: single-item scope, the batch alternative, irreversibility, and a safe dry-run path. Gaps remain around error behavior (nonexistent attachment, insufficient permissions) and whether deletion cascades, but nothing essential to calling it correctly is missing.

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% and each of the eight parameters is documented in the schema, including projectId scoping and testCaseProjectId cross-project nuances. The description adds only the `dry_run` usage hint, which the schema already explains; otherwise it contributes nothing about parameter meaning. Baseline 3 applies when the schema carries the load.

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 ("Deletes the specified Test Step Result Attachment") and immediately disambiguates cardinality, targeting a single item by ID. It explicitly names the sibling `deleteTestStepResultAttachments` for the batch case, so an agent can separate the two without reading either 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 rule: use this for one item by ID, use the plural sibling for the full collection or a batch. It also gives a concrete recommended precondition ("set `dry_run: true` first to validate the arguments"), which is exactly the when-to-use guidance an agent needs before an irreversible call.

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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