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getWorkItemsRelationships

Read-only

Retrieve linked resource identifiers for one named Work Item relationship as JSON:API linkage, without attributes. Inspect a single relationship cheaply before fetching full related resources.

Instructions

Returns the resource identifiers linked from one Work Item through a single named relationship, as JSON:API linkage ({type, id} entries) without the related resources' attributes. relationshipId is the relationship's name, not an entry ID. Use this to inspect one relationship cheaply; to read the Work Item with its related resources embedded, call its get tool with include instead. To change the relationship, use postWorkItemRelationships (add), patchWorkItemRelationships (replace), or deleteWorkItemsRelationship (remove). For Work Item-to-Work Item links with roles, getLinkedWorkItems / getBacklinkedWorkItems are richer. Examples: {"projectId":"myproject","workItemId":"WI-123","relationshipId":"linkedWorkItems","page[size]":50}.

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.
page_size_NoMaximum number of items to return in this page (e.g. `100`). Use together with `page[number]` to paginate through a large result set.
workItemIdYesThe Work Item's ID within its project (e.g. `WI-123`), not the combined `project/id` path used in some link payloads.
page_number_No1-based page number to fetch when the result set is paginated (e.g. `2` for the second page). Combine with `page[size]`; omit to fetch the first page.
relationshipIdYesThe relationship's name as it appears under `relationships` in the owning resource (e.g. `assignee`, `author`, `watches`, `linkedWorkItems`), not an ID of an individual link entry.
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

No arguments

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. Changed2 schema fields changedv1.3.1
    • removedOutput schema / example
      Removed value: -{
      -  "data": [
      -    {
      -      "id": "MyProjectId/WI-123",
      -      "type": "workitems"
      -    }
      -  ]
      -}
    • changedOutput schema / oneOf
      Previous value: -[
      -  {
      -    "properties": {
      -      "data": {
      -        "properties": {
      -          "id": {
      -            "example": "MyResourceId",
      -            "type": "string"
      -          },
      -          "type": {
      -            "enum": [
      -              "collections",
      -              "categories",
      -              "documents",
      -              "document_attachments",
      -              "document_comments",
      -              "document_parts",
      -              "enumerations",
      -              "globalroles",
      -              "icons",
      -              "jobs",
      -              "linkedworkitems",
      -              "externallylinkedworkitems",
      -              "linkedoslcresources",
      -              "llms",
      -              "pages",
      -              "page_attachments",
      -              "page_comments",
      -              "plans",
      -              "projectroles",
      -              "projectgroups",
      -              "projects",
      -              "projecttemplates",
      -              "spaces",
      -              "testparameters",
      -              "testparameter_definitions",
      -              "testrecords",
      -              "teststep_results",
      -              "testruns",
      -              "testrun_attachments",
      -              "teststepresult_attachments",
      -              "testrun_comments",
      -              "usergroups",
      -              "users",
      -              "workitems",
      -              "workitem_attachments",
      -              "workitem_approvals",
      -              "workitem_comments",
      -              "featureselections",
      -              "teststeps",
      -              "workrecords",
      -              "revisions",
      -              "testrecord_attachments",
      -              "license_slots",
      -              "license_types",
      -              "license",
      -              "metadata",
      -              "license_assignments",
      -              "customfields"
      -            ],
      -            "type": "string"
      -          }
      -        },
      -        "type": "object"
      -      }
      -    },
      -    "type": "object"
      -  },
      -  {
      -    "properties": {
      -      "data": {
      -        "items": {
      -          "properties": {
      -            "id": {
      -              "example": "MyResourceId",
      -              "type": "string"
      -            },
      -            "type": {
      -              "enum": [
      -                "collections",
      -                "categories",
      -                "documents",
      -                "document_attachments",
      -                "document_comments",
      -                "document_parts",
      -                "enumerations",
      -                "globalroles",
      -                "icons",
      -                "jobs",
      -                "linkedworkitems",
      -                "externallylinkedworkitems",
      -                "linkedoslcresources",
      -                "llms",
      -                "pages",
      -                "page_attachments",
      -                "page_comments",
      -                "plans",
      -                "projectroles",
      -                "projectgroups",
      -                "projects",
      -                "projecttemplates",
      -                "spaces",
      -                "testparameters",
      -                "testparameter_definitions",
      -                "testrecords",
      -                "teststep_results",
      -                "testruns",
      -                "testrun_attachments",
      -                "teststepresult_attachments",
      -                "testrun_comments",
      -                "usergroups",
      -                "users",
      -                "workitems",
      -                "workitem_attachments",
      -                "workitem_approvals",
      -                "workitem_comments",
      -                "featureselections",
      -                "teststeps",
      -                "workrecords",
      -                "revisions",
      -                "testrecord_attachments",
      -                "license_slots",
      -                "license_types",
      -                "license",
      -                "metadata",
      -                "license_assignments",
      -                "customfields"
      -              ],
      -              "type": "string"
      -            }
      -          },
      -          "type": "object"
      -        },
      -        "type": "array"
      -      }
      -    },
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "properties": {
      +      "data": {
      +        "properties": {
      +          "id": {
      +            "type": [
      +              "string",
      +              "number",
      +              "integer",
      +              "boolean",
      +              "null"
      +            ]
      +          },
      +          "type": {
      +            "type": [
      +              "string",
      +              "number",
      +              "integer",
      +              "boolean",
      +              "null"
      +            ]
      +          }
      +        },
      +        "type": [
      +          "object",
      +          "null"
      +        ]
      +      }
      +    },
      +    "type": [
      +      "object",
      +      "null"
      +    ]
      +  },
      +  {
      +    "properties": {
      +      "data": {
      +        "items": {
      +          "properties": {
      +            "id": {
      +              "type": [
      +                "string",
      +                "number",
      +                "integer",
      +                "boolean",
      +                "null"
      +              ]
      +            },
      +            "type": {
      +              "type": [
      +                "string",
      +                "number",
      +                "integer",
      +                "boolean",
      +                "null"
      +              ]
      +            }
      +          },
      +          "type": [
      +            "object",
      +            "null"
      +          ]
      +        },
      +        "type": [
      +          "array",
      +          "null"
      +        ]
      +      }
      +    },
      +    "type": [
      +      "object",
      +      "null"
      +    ]
      +  }
      +]
  4. Changed1 schema field changedv1.2.2
    • changedInput schema / properties / relationshipId / description
      Previous value: -"The ID of the specific relationship entry linking the two resources, as returned by the corresponding get-relationships call."New value: +"The relationship's name as it appears under `relationships` in the owning resource (e.g. `assignee`, `author`, `watches`, `linkedWorkItems`), not an ID of an individual link entry."
  5. Changed8 schema fields changedv1.2.0
    • 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 / page_number_ / description
      Previous value: -"Specify the page number to be returned. Counting starts from 1. 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: +"1-based page number to fetch when the result set is paginated (e.g. `2` for the second page). Combine with `page[size]`; omit to fetch the first page."
    • changedInput schema / properties / page_size_ / description
      Previous value: -"Limit the number of entities returned in a single response. 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: +"Maximum number of items to return in this page (e.g. `100`). Use together with `page[number]` to paginate through a large result set."
    • 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 / relationshipId / description
      Previous value: -"The Relationship ID."New value: +"The ID of the specific relationship entry linking the two resources, as returned by the corresponding get-relationships call."
    • 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."
  6. Changed1 schema field changedv1.1.0
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "description": "The Relationship's response body. Can return a single or a list of instances",
      +  "example": {
      +    "data": [
      +      {
      +        "id": "MyProjectId/WI-123",
      +        "type": "workitems"
      +      }
      +    ]
      +  },
      +  "oneOf": [
      +    {
      +      "properties": {
      +        "data": {
      +          "properties": {
      +            "id": {
      +              "example": "MyResourceId",
      +              "type": "string"
      +            },
      +            "type": {
      +              "enum": [
      +                "collections",
      +                "categories",
      +                "documents",
      +                "document_attachments",
      +                "document_comments",
      +                "document_parts",
      +                "enumerations",
      +                "globalroles",
      +                "icons",
      +                "jobs",
      +                "linkedworkitems",
      +                "externallylinkedworkitems",
      +                "linkedoslcresources",
      +                "llms",
      +                "pages",
      +                "page_attachments",
      +                "page_comments",
      +                "plans",
      +                "projectroles",
      +                "projectgroups",
      +                "projects",
      +                "projecttemplates",
      +                "spaces",
      +                "testparameters",
      +                "testparameter_definitions",
      +                "testrecords",
      +                "teststep_results",
      +                "testruns",
      +                "testrun_attachments",
      +                "teststepresult_attachments",
      +                "testrun_comments",
      +                "usergroups",
      +                "users",
      +                "workitems",
      +                "workitem_attachments",
      +                "workitem_approvals",
      +                "workitem_comments",
      +                "featureselections",
      +                "teststeps",
      +                "workrecords",
      +                "revisions",
      +                "testrecord_attachments",
      +                "license_slots",
      +                "license_types",
      +                "license",
      +                "metadata",
      +                "license_assignments",
      +                "customfields"
      +              ],
      +              "type": "string"
      +            }
      +          },
      +          "type": "object"
      +        }
      +      },
      +      "type": "object"
      +    },
      +    {
      +      "properties": {
      +        "data": {
      +          "items": {
      +            "properties": {
      +              "id": {
      +                "example": "MyResourceId",
      +                "type": "string"
      +              },
      +              "type": {
      +                "enum": [
      +                  "collections",
      +                  "categories",
      +                  "documents",
      +                  "document_attachments",
      +                  "document_comments",
      +                  "document_parts",
      +                  "enumerations",
      +                  "globalroles",
      +                  "icons",
      +                  "jobs",
      +                  "linkedworkitems",
      +                  "externallylinkedworkitems",
      +                  "linkedoslcresources",
      +                  "llms",
      +                  "pages",
      +                  "page_attachments",
      +                  "page_comments",
      +                  "plans",
      +                  "projectroles",
      +                  "projectgroups",
      +                  "projects",
      +                  "projecttemplates",
      +                  "spaces",
      +                  "testparameters",
      +                  "testparameter_definitions",
      +                  "testrecords",
      +                  "teststep_results",
      +                  "testruns",
      +                  "testrun_attachments",
      +                  "teststepresult_attachments",
      +                  "testrun_comments",
      +                  "usergroups",
      +                  "users",
      +                  "workitems",
      +                  "workitem_attachments",
      +                  "workitem_approvals",
      +                  "workitem_comments",
      +                  "featureselections",
      +                  "teststeps",
      +                  "workrecords",
      +                  "revisions",
      +                  "testrecord_attachments",
      +                  "license_slots",
      +                  "license_types",
      +                  "license",
      +                  "metadata",
      +                  "license_assignments",
      +                  "customfields"
      +                ],
      +                "type": "string"
      +              }
      +            },
      +            "type": "object"
      +          },
      +          "type": "array"
      +        }
      +      },
      +      "type": "object"
      +    }
      +  ],
      +  "type": "object"
      +}
  7. Changed6 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."
    • removedInput schema / properties / page_number
      Removed value: -{
      -  "description": "Specify the page number to be returned. Counting starts from 1. 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.",
      -  "format": "int32",
      -  "type": "number"
      -}
    • addedInput schema / properties / page_number_
      Added value: +{
      +  "description": "Specify the page number to be returned. Counting starts from 1. 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.",
      +  "format": "int32",
      +  "type": "number"
      +}
    • removedInput schema / properties / page_size
      Removed value: -{
      -  "description": "Limit the number of entities returned in a single response. 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.",
      -  "format": "int32",
      -  "type": "number"
      -}
    • addedInput schema / properties / page_size_
      Added value: +{
      +  "description": "Limit the number of entities returned in a single response. 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.",
      +  "format": "int32",
      +  "type": "number"
      +}
  8. First observedv1.0.0

TDQS

A4.4/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered; the description still adds payload semantics — linkage-only, no attributes, single relationship, cheap read — which is genuine context beyond the annotations. Minor deduction because the example uses `page[size]`/`page[number]`-style bracketed keys while the schema property is `page_size_`, so an agent copying the example verbatim could pass a mismatched parameter name.

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 the return shape, then the alternative routing, then mutations, then an example — each sentence does work. Slightly long and the trailing example's bracketed pagination keys don't match the schema's parameter names, which costs a bit of precision.

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?

For a read-only relationship-fetch tool with an output schema and full schema coverage, nothing needed for correct invocation is missing: it names the alternative, the write siblings, the related richer link tools, and shows a sample call. Return-value detail is correctly left to the output schema.

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 already explains `relationshipId` (name, not entry ID), `projectId`, `fields`, `include`, `revision`, and pagination — so the description's clarification of `relationshipId` largely restates the schema. The inline example does add some concrete value by showing a realistic call shape, but no new semantics for the 9 parameters.

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 ('Returns the resource identifiers linked from one Work Item through a single named relationship') and immediately pins down the response shape as JSON:API linkage `{type, id}` entries without attributes. Explicitly disambiguates `relationshipId` as the relationship *name*, not an entry ID, so an agent cannot confuse it with a link record.

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 selection rule against the main alternative ('Use this to inspect one relationship cheaply; to read the Work Item with its related resources embedded, call its get tool with `include` instead') and routes writes to the three named mutation siblings by operation (add/replace/remove). It also points to `getLinkedWorkItems`/`getBacklinkedWorkItems` when role-bearing Work Item-to-Work Item links are needed.

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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