Most people use guardrail to mean a filter on what an AI writes. It stops rude words, off-topic replies and private data getting out. A sales agent can pass all of those checks and still send I can do twenty percent if you sign this week. That message is polite and on topic. It is also a promise nobody approved.
A promise guardrail sits beside wording filters and access controls, and it catches what both of those let through.
This page explains what one guardrail is. For the full set a sales agent needs, read What guardrails does an AI sales agent need?
Three kinds of check, each with its own question
| kind | what it asks | what it catches |
|---|---|---|
| access | may this agent use this tool and this data? | an agent somewhere it shouldn't be |
| wording | is this sentence safe to send? | rudeness, leaks, off-topic replies |
| promises | what does this commit us to, and is the agent allowed to? | a discount nobody approved, a date nobody can keep, an expired certification quoted as if it were current |
Most teams don't have the third kind yet.
What a promise guardrail is made of
- A separate choice for each kind of promise. One slider from careful to bold is too blunt. Some promises are never allowed. Others are allowed once the agent has a reliable fact to read.
- The facts the agent may rely on, each with an owner and a date.
- Limits on how much it may contact each buyer, and how much of your approvers' time it may use.
- A record of each check.
Where Reynforce fits
Reynforce does the third kind of check, on promises. Your Rules say what each agent may promise for each kind of work. Your Facts hold what is true. The agent checks with Reynforce before it sends, and the answer is saved on the Activity page.
When Reynforce is the wrong choice
- You need a wording filter or access control. Good tools exist for both, and Reynforce is neither of them.
- Your agents never talk to customers. Then there is nothing for this kind of check to look at.
What it costs
£99 a month for each agent for your first 10 agents. After that it is £79 a month for each agent, up to 49 agents. If you pay for a year at once, you get two months free. If you want us to set it up and get it signed off with you, that starts at £2,500, paid once, and the price depends on the agent's job. Pricing has the rest.