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hhopke
by hhopke

icu_update_event

Idempotent

Update an existing calendar event by providing only the fields you want to change; other event details stay as-is.

Instructions

Update an existing calendar event.

Only fields you pass are sent — other fields remain unchanged. For category and training_availability semantics, see intervals-icu://event-categories. For WORKOUT description syntax, see intervals-icu://workout-syntax.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNoUpdated event name
colorNoUpdated color (hex string)
end_dateNoUpdated end date (YYYY-MM-DD)
event_idYesEvent ID to update
athlete_idNoAthlete ID (for coaches managing multiple athletes)
event_typeNoUpdated activity type
start_dateNoUpdated start date (YYYY-MM-DD)
descriptionNoUpdated description. For WORKOUT events the server parses this into structured, device-syncable steps with zones and a training load. Use Intervals.icu workout syntax: one step per line as '- <duration> <target>' (duration FIRST), grouped under Warmup / Main / Cooldown headers. Targets: bike '- 5m 85%', '- 5m Z4', or absolute '- 5m 210w'; HR '- 10m 70-80% HR' or '- 10m 145bpm'; run/swim pace '- 5m Z2 Pace', absolute only with a trailing 'pace' word: '- 5m 4:45/km pace', '- 200mtr 1:45/100m pace' (bare '5:00/km' or '1:45/100m' silently drops); threshold is relative — run '- 25m 100% pace', swim CSS '- 200mtr 100% pace' — the words 'threshold'/'CSS'/'5K pace' are NOT parsed as targets. Add cadence to any step: '- 3m Z2 90rpm'. No target: '- 20m free'. Repeats: put 'Nx' after a section name with steps flat beneath, and leave a blank line before and after the repeat block (without it the repeat silently runs only once) — e.g. 'Main 5x' then '- 3m 110%' / '- 3m 50%'. Ramps: '- 10m ramp 50-70%'. Rest: append 'Ns rest' to a step ('- 200mtr Z2 20s rest') or use a separate '- 20s intensity=rest' step (only intensity=rest exports as a device rest step) — never a bare '- 20s' step (that becomes work, not rest). Durations: 'm'=minutes, 's'=seconds; distance steps use 'mtr'=meters / 'km' / 'yrd' (e.g. swim '- 400mtr Z2 Pace'). Do NOT write '[repeat 5x ...]', nested bullets, or 'Z5 3m' (target before duration). Runs need a pace or HR target — a bare 'Z2' gives no load. Full reference: intervals-icu://workout-syntax resource.
show_as_noteNoShow event as a note on the fitness chart
training_loadNoUpdated training load
distance_metersNoUpdated distance in meters
duration_secondsNoUpdated duration in seconds
show_on_ctl_lineNoRender event on the CTL line
not_on_fitness_chartNoHide event from the fitness chart
training_availabilityNoUpdated training availability: NORMAL, LIMITED, or UNAVAILABLE

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

Annotations indicate idempotent (idempotentHint=true) and non-destructive (destructiveHint=false). The description adds the key behavior 'Only fields you pass are sent — other fields remain unchanged', which goes beyond annotations.

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?

The description is three sentences long, front-loading the main purpose and key behavior. Every sentence adds value, and it is extremely concise.

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 the tool has 15 parameters with complete schema descriptions, an output schema, and clear annotations, the description complements well. For a complex tool, additional guidance on typical use could be beneficial, but it is largely complete.

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 documentation coverage is 100%, so the baseline is 3. The description adds no individual parameter detail beyond what the schema already provides, but the external references (for category and workout syntax) offer additional context.

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 'Update an existing calendar event', which is a specific verb and resource. It differentiates from sibling tools like create_event, delete_event, and get_event by its update focus.

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 implies usage for updating existing events but does not explicitly state when to use this tool versus alternatives (e.g., bulk operations or creating events). No exclusions are provided.

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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