Xcode MCP Server

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the action ('Build') but doesn't mention whether this is a read-only or destructive operation, what permissions or dependencies are required, how long it might take, or what happens on failure. For a build tool with potential side effects, this is a significant gap in transparency.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence that front-loads the core purpose without unnecessary words. Every part earns its place by specifying the action, target, and key parameters, making it easy to scan and understand quickly.

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

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

Given the complexity of building an Xcode project (which can involve compilation, dependencies, and potential errors), no annotations, and no output schema, the description is incomplete. It doesn't address behavioral aspects like error handling, output format, or integration with sibling tools, leaving significant gaps for an AI agent to use it correctly.

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

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 all 5 parameters thoroughly. The description adds no additional meaning beyond implying that 'scheme' and 'configuration' are key inputs, but doesn't clarify parameter interactions or provide examples. Baseline 3 is appropriate when the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Build') and resource ('an Xcode project'), specifying the target with 'specific scheme and configuration'. It distinguishes from siblings like 'xcode_archive_project' or 'xcode_test_project' by focusing on the build operation, but doesn't explicitly differentiate from 'xcode_build_for_device' which might be a more specific variant.

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

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

The description provides no guidance on when to use this tool versus alternatives like 'xcode_build_for_device' or 'xcode_archive_project'. It lacks context about prerequisites (e.g., needing Xcode installed) or exclusions (e.g., not for testing). Usage is implied only by the name and action, with no explicit when/when-not statements.

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