[API Shield] Transform Rules fields (#17684)

* Transform Rules fields

* add link

* feedback

Author: patriciasantaana

src/content/docs/api-shield/security/jwt-validation/transform-rules.mdx

@@ -35,3 +35,28 @@ As an example, to send the header `x-send-jwt-claim-user` request header to the
 5. Choose **Set dynamic**.
 6. Set the header name.
 7. Set the value to `lookup_json_string(http.request.jwt.claims["<TOKEN_CONFIGURATION_ID>"][0], "claim_name")`, where `<TOKEN_CONFIGURATION_ID>` is your token configuration ID found in JWT Validation and `claim_name` is the JWT claim you want to add to the header.
+
+## Available fields
+
+You can create Transform Rules using more claims present in tokens processed by [JWT Validation](/api-shield/security/jwt-validation/).
+
+- `http.request.jwt.claims.aud,`
+- `http.request.jwt.claims.aud.names,`
+- `http.request.jwt.claims.aud.values,`
+- `http.request.jwt.claims.iat.sec,`
+- `http.request.jwt.claims.iat.sec.names,`
+- `http.request.jwt.claims.iat.sec.values,`
+- `http.request.jwt.claims.iss,`
+- `http.request.jwt.claims.iss.names,`
+- `http.request.jwt.claims.iss.values,`
+- `http.request.jwt.claims.jti,`
+- `http.request.jwt.claims.jti.names,`
+- `http.request.jwt.claims.jti.values,`
+- `http.request.jwt.claims.nbf.sec,`
+- `http.request.jwt.claims.nbf.sec.names,`
+- `http.request.jwt.claims.nbf.sec.values,`
+- `http.request.jwt.claims.sub,`
+- `http.request.jwt.claims.sub.names,`
+- `http.request.jwt.claims.sub.values,`
+- `cf.api_gateway.auth_id_present,`
+- `cf.api_gateway.request_violates_schema`