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meta_ads_conversions_send_purchase

Sends a single Purchase event via Meta Conversions API. Requires purchase amount, currency, and hashed user identifiers for attribution.

Instructions

Sends a single Purchase event via the Meta Conversions API — the most common CAPI use case. Returns Meta's events_received acknowledgement. Mutating on Meta's side. Required fields model a typical purchase: amount, currency, and hashed user identifiers. For other event types use meta_ads_conversions_send_lead (leads) or the generic meta_ads_conversions_send (AddToCart / custom events / batching multiple events).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
valueYesPurchase amount in the specified currency. Decimal for currencies with minor units (USD 9.99); integer is fine for JPY.
currencyYesISO 4217 currency code (USD, JPY, EUR, GBP). Must match the ad account's reporting currency or be one that Meta can convert.
pixel_idYesMeta Pixel ID the event is attributed to. Find via meta_ads_pixels_list. CAPI events flow into the same pixel as browser events; dedupe happens on event_id if one is supplied in user_data / custom_data.
user_dataYesUser identifying fields for attribution. Supported keys: em (email), ph (phone), fn (first_name), ln (last_name), zp (zip), ct (city), st (state), country, external_id, client_ip_address, client_user_agent, fbc (click ID), fbp (browser ID). mureo hashes em / ph / fn / ln / zp / ct / st / country / external_id with SHA-256 before sending — pass raw PII; do not pre-hash.
account_idNoMeta Ads account ID in the format 'act_XXXXXXXXXX' (e.g. 'act_1234567890'). Optional — falls back to META_ADS_ACCOUNT_ID from the configured credentials. The leading 'act_' prefix is required.
event_timeYesUNIX timestamp (seconds) of the purchase. Must be within the last 7 days.
content_idsNoProduct IDs associated with the purchase — catalog retailer_ids for DPA attribution. Optional but recommended when a catalog is in use.
test_event_codeNoMeta Events Manager test_event_code. When set, the event is routed to the test event stream visible in Events Manager instead of production reporting. Use for validation; drop the field once verified. Get the code from Events Manager → Test Events tab.
event_source_urlNoFully-qualified URL where the event occurred. Required by Meta for action_source='website' events; recommended for any browser-triggered CAPI event to improve attribution match rate.
Behavior4/5

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

The description discloses that the tool is 'Mutating on Meta's side' and 'Returns Meta's events_received acknowledgement', which are important behavioral traits. With no annotations provided, the description carries the full burden and does so reasonably well, though it could mention potential side effects or error conditions.

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 concise, with four sentences that are front-loaded and each adds value. No unnecessary details or repetition.

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 moderate complexity (9 parameters, no output schema), the description covers core aspects: event type, mutation, response format, and how required fields relate to a typical purchase. It could include the event_time 7-day constraint mentioned in the schema for completeness, but overall it is fairly complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3. The description adds value by summarizing key required fields ('amount, currency, and hashed user identifiers') and stating that user data is hashed automatically, reinforcing schema details without redundancy.

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's purpose: 'Sends a single Purchase event via the Meta Conversions API'. It identifies the specific verb and resource, and distinguishes this tool from siblings by naming alternative tools for other event types.

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

Usage Guidelines5/5

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

Explicit usage guidance is provided: 'For other event types use meta_ads_conversions_send_lead (leads) or the generic meta_ads_conversions_send (AddToCart / custom events / batching multiple events).' This tells the agent when to use this tool versus alternatives.

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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