SYNCDATE

connect_ical_feed

Connect a read-only iCal feed (.ics URL). Direct — no browser redirect needed. Returns the new account_id. Validates the feed is reachable before creating the account. Re-connecting the same URL is idempotent.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "url": "<url>"
    },
    "name": "connect_ical_feed"
  }
}

Input Schema

Name	Required	Description
`url`	Yes	iCal feed URL (https:// or webcal://)
`name`	No	Optional display name for the account (max 120 chars)
`password`	No	Optional Basic Auth password. Requires username to also be set, and an https:// or webcal:// URL.
`username`	No	Optional Basic Auth username. Requires password to also be set, and an https:// or webcal:// URL.

Schema Changelog

Changes observed during successful MCP inspections.

First observedOct 20, 2026

TDQS

A3.8/5.0

Behavior4/5

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

Beyond the annotations (readOnlyHint=false, destructiveHint=false), the description discloses several real traits: it creates an account, validates reachability before creation, returns account_id, and is idempotent on repeated URLs. This is meaningful behavioral context; it does not cover auth-failure behavior or rate limits, but the mutation and safety profile are clear.

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?

Four short sentences, front-loaded with purpose, then behavior (direct), return value (account_id), validation and idempotency. Each sentence carries distinct information with no filler.

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?

With no output schema, the description usefully states the return value (account_id), and annotations carry the safety profile. It is nearly complete; a note on failure modes when validation fails would close the remaining gap.

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%, so url/name/password/username are already documented with their constraints (https/webcal, max 120 chars, Basic Auth pairing). The description adds only that the feed is read-only .ics; it does not clarify password/username pairing beyond the schema. 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 (Connect) and resource (read-only iCal feed / .ics URL), and the '.ics' plus 'read-only' detail clearly differentiates it from CalDAV (connect_caldav_account) and generic account connections. It does not name the alternative sibling explicitly, so an agent infers rather than is told the contrast.

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?

'Direct — no browser redirect needed' implies when this path is preferable to a redirected connect flow, and the idempotency note tells the agent re-connecting is safe. However there is no explicit statement of when to choose this versus connect_caldav_account or connect_account, nor any when-not guidance.

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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