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johsem

Semaphore UI MCP server

by johsem

create_schedule

Destructive

Creates a schedule for a Semaphore UI project by submitting API fields, enabling automated task runs at specified times or cron intervals.

Instructions

create schedule. POST /project/{project_id}/schedules. Supply API fields in body; JSON-encoded string fields must remain strings.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
bodyYes
project_idYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.4/5.0
Behavior2/5

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

Annotations already declare destructiveHint=true, openWorldHint=true and idempotentHint=false; the description adds only a note about body field encoding. It never warns that creating a schedule may trigger automated jobs, that schedules are persistent/destructive state, or what happens on duplicate creation.

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?

Very short and front-loaded with the route and the key encoding caveat; only the redundant opening fragment 'create schedule' wastes space.

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?

For a destructive create tool with a 0%-documented nested body, no output schema and no annotations explanation of consequences, this is far too thin; an agent could not safely construct a valid schedule body from this definition alone.

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% and the body is a large nested object, yet the description only says to 'supply API fields in body' and that JSON-encoded strings stay strings. It explains nothing about the schedule 'type' enum, cron_format vs run_at, task_params, or which of project_id/template_id/repository_id drive behavior.

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

Purpose3/5

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

States the verb and resource ('create schedule') plus the route 'POST /project/{project_id}/schedules', so an agent can tell it makes a new schedule under a project. However, it does not differentiate from nearby siblings such as create_task, create_template or validate_schedule, and the first sentence merely restates the tool name.

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 guidance on when to use this versus validate_schedule, list_schedules or update_schedule, and no prerequisites (e.g. whether a template_id or repository_id is mandatory). The agent must infer usage entirely from the schema.

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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