Bitbucket Server MCP

save_attachment_metadata

Update or create metadata for an attachment in a repository. Provide project key, repo slug, attachment ID, and JSON metadata.

Instructions

Create or update metadata for an attachment.

The metadata field must be valid JSON.

Args: project_key: The project key. repo_slug: The repository slug. attachment_id: The numeric attachment ID. metadata: JSON string of metadata to save.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "project_key": "<project_key>",
      "repo_slug": "<repo_slug>",
      "attachment_id": "<attachment_id>",
      "metadata": "<metadata>"
    },
    "name": "save_attachment_metadata"
  }
}

Input Schema

Name	Required	Description	Default
`project_key`	Yes
`repo_slug`	Yes
`attachment_id`	Yes
`metadata`	Yes

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.7.0May 28, 2026

TDQS

C2.9/5.0

Behavior2/5

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

With no annotations, the description carries the full burden. It mentions that metadata must be valid JSON but does not disclose idempotency, destructive nature, or what happens if metadata already exists. Lacks behavioral details expected for a mutation tool.

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?

The description is short and front-loaded with the purpose. It uses a docstring-like structure with Args, which is clear. No unnecessary words, though it could be slightly more structured.

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

Completeness2/5

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

Output schema exists, so return values are covered, but the description lacks details on success indicators, error handling, or side effects. For a tool with 4 required params and no annotations, this is insufficient.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description should compensate. It lists all four parameters but only adds meaningful info for metadata (must be valid JSON). For project_key, repo_slug, attachment_id, it merely repeats names, adding little value 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?

The description explicitly states 'Create or update metadata for an attachment,' which is a specific verb-resource combination. This clearly differentiates it from sibling tools like get_attachment_metadata and get_attachment, which are for retrieval.

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

Usage Guidelines2/5

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

No explicit guidance on when to use this tool versus alternatives (e.g., get_attachment_metadata for reading). The description does not provide any context or exclusions, leaving the agent to infer from sibling names.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Deploy Server