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changedetection-mcp

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changedetection_list_watches

Read-only

Retrieve configured website watches from changedetection.io, optionally filtered by tag, to review and manage monitored pages.

Instructions

List watches. GET /api/v1/watch. Optional tag name filter. Recheck-all is a separate write tool.

Input Schema

NameRequiredDescriptionDefault
tagNoTag name to filter the list.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.5/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=true, so the safety profile is covered structurally. The description adds only that the call maps to GET /api/v1/watch and that recheck-all is a distinct write path; it says nothing about pagination, result ordering, or whether the list can be large.

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?

Four short fragments with the core operation front-loaded and the sibling caveat last; nothing is padded. The raw endpoint string is arguably low-value for an agent but is compact enough not to hurt.

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?

For a one-optional-parameter read tool with full annotation coverage and no output schema, the description covers what the tool does and the one filtering option. It falls short only on return-shape hints (e.g., whether watches include tags/state) that would help an agent decide between this and get_watch.

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 description coverage is 100% and the single tag parameter is documented as a filter, so the description's mention of 'Optional tag name filter' merely corroborates the schema. No added syntax, matching behavior, or case-sensitivity detail beyond what the schema states; baseline 3 applies.

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

Purpose4/5

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

States a specific verb and resource ('List watches') plus the underlying endpoint, so the operation is unambiguous. It also separates itself from recheck-all by labeling that a write tool, though it doesn't differentiate from other read siblings like list_tags or get_watch.

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 clause 'Recheck-all is a separate write tool' implicitly steers an agent away from treating this as a state-changing recheck, which is useful routing. However, there is no explicit when-to-use guidance, no mention of when to filter by tag versus listing everything, and no stated alternatives for fetching a single watch.

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