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smallest-inc

Smallest MCP Server

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make_branch_live

Promote a branch head to the live serving configuration for an AI agent, switching the branch the agent runs. Requires the branch to pass security validation.

Instructions

Make a branch's head revision the live (serving) configuration for the agent. Under the branch model only a branch head can serve — so this switches which branch the agent runs. Use list_branches to find branch IDs. The head must have passed its security check (otherwise this is rejected).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
agent_idYesThe agent ID
branch_idYesThe branch to make live (from list_branches)
Behavior3/5

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

No annotations provided, so description carries full burden. Discloses effect (switches live branch) and security check requirement, but does not mention reversibility, permissions, or success/failure response. Adequate but not rich.

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

Conciseness5/5

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

Three short sentences, each serving a clear purpose: purpose, context, prerequisite. No wasted words. Front-loaded with the primary action.

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?

Given simple parameters and no output schema, description covers purpose, prerequisites, and a constraint. Missing mention of what happens on success (e.g., return value or side effect), but otherwise complete for the tool's simplicity.

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 coverage is 100% with descriptions for both parameters. Description adds a hint about branch_id source (from list_branches) but no additional semantic value beyond the schema. Baseline 3 is appropriate.

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?

Clearly states the verb 'make' and resource 'branch's head revision the live configuration for the agent'. Distinguishes from sibling tools like list_branches (listing), create_branch (creating), and delete_branch (deleting).

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

Usage Guidelines4/5

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

Explicitly tells to use list_branches to find branch IDs and mentions the prerequisite that the head must pass security check. Does not contrast with similar tools like publish_draft but given the distinct action, the context is clear.

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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