recent_price_changesThe most recent verified SaaS price changes and the biggest movers of the last 30 days, across the whole catalogue. Call this when the user asks what changed in SaaS pricing lately, who raised prices recently, or for examples of price increases. Fixed snapshot of up to 25 entries per group — no pagination.
| Name | Required | Description | Default |
|---|---|---|---|
No arguments | |||
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The readOnlyHint annotation already signals a safe read operation. The description adds valuable behavioral context by noting 'Fixed snapshot of up to 25 entries per group — no pagination,' which informs the agent about data limits and lack of iterability. It does not contradict the annotation and adds meaningful detail beyond it.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is three sentences: it leads with the core purpose, then gives explicit invocation cues, and closes with a behavioral note. Every sentence carries meaning, with no redundancy or filler.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple, read-only, no-parameter tool, the description covers purpose, usage, and a key behavioral trait (fixed snapshot). The only minor gap is the ambiguous term 'group' (e.g., group of what?), but this does not significantly impede tool selection or invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool has zero parameters, and the description does not need to explain any. The baseline for 0 parameters is 4, and the description appropriately focuses on behavior and usage rather than inventing parameter details.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool returns 'the most recent verified SaaS price changes and the biggest movers of the last 30 days, across the whole catalogue.' This gives a specific verb (returns), resource (price changes), and scope (whole catalogue), effectively distinguishing it from sibling tools like search_products or get_product.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly says 'Call this when the user asks what changed in SaaS pricing lately, who raised prices recently, or for examples of price increases.' This provides clear context for when to use the tool, but it does not explicitly mention when not to use it or name alternatives, so it stops short of a 5.
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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Each tool has a clear, distinct purpose: searching, fetching details, comparing, history, recent changes, alerts, stack, and list. No two tools appear to overlap in functionality, making selection unambiguous.
Most tools follow a verb_noun pattern (compare_products, create_price_alert, get_price_history, get_product, get_stack, list_alerts, search_products), but recent_price_changes breaks the pattern as an adjective_noun. Minor inconsistency but still predictable.
8 tools is well-scoped for a price tracking service, covering search, detailed lookups, comparisons, history, alerts, and user-specific views without unnecessary bloat.
Core workflows are covered: search, view details, compare, get history, set alerts, and view tracked stack. Missing update/delete alert operations and a way to manage tracked products directly, but these are minor gaps agents can work around.