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LCM2M

lcm2m-caddis-mcp

by LCM2M

Equipment shift history

caddis_get_equipment_shift_history
Read-onlyIdempotent

Retrieve historical shift boundaries (scheduled and worked) for an equipment within a defined start-end window. Response is TOON-encoded.

Instructions

Historical shift boundaries (start/end, scheduled/worked) for a piece of equipment. Both start and end are required — this is a closed-window query.

Responses are TOON-encoded (toonformat.dev) — a token-efficient JSON dialect mixing YAML-style indentation with CSV-style tables. Example:

name: Caddis Co timezone: America/Denver equipment[3]{id,name,tags,current_status.status,current_status.reason_id}: 1,Mill A,"["cnc","critical"]",running,null 2,"Press, Big",null,down,3 3,Lathe C,null,null,null

  • Object fields: key: value; nested objects indent their children.

  • Uniform arrays of objects: field[N]{cols}: followed by N indented comma-separated rows in column order.

  • Nested objects inside table rows are recursively flattened to dotted columns (e.g. current_status.status, input_setup.cycle.logic); a null parent yields null across all its dotted columns (see row 3 above).

  • Primitive arrays at object level: field[N]: a,b,c inline.

  • Arrays inside table cells are JSON-stringified into a single cell value (JSON.parse() to recover); empty arrays render as null (see rows 1–3 tags column).

  • Strings with commas/colons/quotes/leading whitespace are double-quoted (escapes: \\, \"); other strings, numbers, booleans, and null are bare.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
endYesISO 8601 window end (required)
startYesISO 8601 window start (required)
equipIdYesNumeric identifier (accepts either string or number form)
Behavior4/5

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

Annotations already declare readOnlyHint, openWorldHint, and idempotentHint. The description adds substantial context about the TOON-encoded response format with a detailed example, which is critical since there is no output schema. No contradiction with annotations.

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

Conciseness3/5

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

The description front-loads the purpose but then includes a lengthy TOON encoding explanation and example. While informative, it could be condensed. The encoding details are necessary given no output schema, but they make the description verbose.

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

Completeness3/5

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

The description covers the query constraints and output format thoroughly, but it does not specify the exact fields returned for shift boundaries (e.g., scheduled start/end, worked start/end). The example is about equipment, not shift history. Pagination or limits are not mentioned.

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 good descriptions. The description adds the concept of a 'closed-window query' but does not provide new details beyond what the schema already states. 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?

The description clearly states the tool retrieves historical shift boundaries (start/end, scheduled/worked) for a piece of equipment, with specific verb+resource. It also distinguishes itself from sibling tools like caddis_get_equipment_schedule by focusing on shift boundaries and requiring a closed window.

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

Usage Guidelines3/5

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

The description explicitly states 'Both start and end are required — this is a closed-window query,' which tells the agent to provide both parameters. However, it does not provide guidance on when not to use this tool or compare it to alternatives like caddis_get_equipment_schedule.

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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